To much protein bad for kidneys?

with increased training or harder training or whatever you do in extreme for activity then you will adjust diet or supplement to compliment that so it is relative to your goals and training but I also agree that everything in balance - relative to your needs of course.
What may be too much for your kidneys may not be too much for others...visa versa.  If you are within range of 1-2 gm protein per lb bodyweight per day then you are fine.

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what about kidney damage from creatine?

Myth.

that has happened before due to the excess creatinine the liver and kidneys are working hard to get out.

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Guys, what do you think happens to excess protein in the body?  It is not a myth, and it is certainly not paranoid people, it is science.  Nitrogen is poison, or nitrogenous waste if not used.  This is the NH3 group on the amino acid.  Obviously, there is no storage form for protein, so the body has to rid this toxic excess ammonia by way of the urea cycle.  That is how the body works.

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excess protein in ur body u just **** out

What do I think happens to excess protein in the body?   I think the body oxidizes it and gets rid of the nitrogen in the amino group through urine, and uses the carboxyl group and converts it to glucose or then to fat. 
 
If you read what I said about someone tested to be in NEGATIVE nitrogen balance at 1.5 grams per pound of bodyweight (300 g protein) that shoots the theory in the butt.  Because that means there's not even enough dietary nitrogen to make muscle nonetheless pollute the body, even at 300 grams of protein for that individual. In fact, him being catabolic is what would cause a nitrogen overload on the kidneys, not the fact he consumed 300 grams of protein!  It's a completely relative thing.  The more you train the more protein you need to remain anabolic.
 
And what exactly did you say is science?  There has not been one single study that has "concluded" that too much protein is bad for the kidneys.  Just because the body works in such a way that nitrogen is excreted when protein is broken down does NOT mean you can pretend that's science and say it causes kidney damage.   All that is, is kidneys fulfilling their job.  I read all the journals and visit all the college research programs regularly so if you think there is one, by all means quote it and show it, and I'll look up the journal. 
 
I'm not saying it's wise to overload on anything in general (ie the thread title of TOO much protein), however, if you choose to partake in intense weightlifting and do so regularly, you must do what is required otherwise you will shrink down to nothing, lose all your lean body mass, and die. So go ahead and eat your RDA 60 grams of protein while weight training and see what happens. 
 
I also mentioned the urea function of the kidneys and how it takes the waste from the blood due to oxidative breakdown of protein, however if all the protein is brought into your muscles for repair via hormones like insulin, there's no EXCESS nitrogen from dietary sources. Nitrogen would only come from natural bodily oxidative processes which will be excreted in the urine like normal. 
 
More protein in does NOT mean more protein out if you are weight training intensely.  If you are anabolic you are not secreting much nitrogen at all, compared to if you're catabolic (from not consuming ENOUGH protein).  If you're building UP muscle protein, nitrogen cannot be excreted from it, if you tear down muscle protein (normal bodily processes; ie protein turnover) THEN your body separates the amino (nitrogen) and carboxyl (carbohydrate precursor), and excretes the nitrogen.
 
So let's discuss this in general terms.  Your normal bodily processes are that of building up tissue and breaking down tissue. So for normal life to occur you have to intake protein, and then it will excrete the nitrogen from its later breakdown.  That's the proces of life, how nature intended it.  Indeed, human wastes serve as nitrogen fertilizer for the soils so it works out just great.  But let's bring weight training into the equation.  It GREATLY increases the breakdown of protein (catabolism) away from homeostasis.  So if nothing is done you will break down MUSCLE protein, and excrete a lot MORE nitrogen (which you wanted to avoid) unlike if you consumed MORE protein to become anabolic.  So you need to increase consumption of many, many amino acids to stay anabolic the harder you work out.  If you're anabolic, hardly any nitrogen will be excreted, but admittedly it's very hard to be totally anabolic all the time, because your body wants to breakdown tissue to replace new tissue.  However, maintaining anabolism is a help to your body when you weight train, and then when the body does go through periods of catabolism, it is because of "natural bodily processes" and NOT due to extra protein, that produces the nitrogen for the kidneys to excrete.

The other thing I mentioned was the one thing that should be worried about in consuming excess meat. Excess toxins can build up in the intestine, and even some nitrogenous waste on the insteinal walls (both from intestinal bacteria and meat residues).  There is a big correlation between meat consumption and slowing of the digestive tract.  And there have been studies showing nitrogenous waste in the intestine under extra meat consumption.  So it's important to intake lots of fiber and focus primarily on the most absorbable proteins like yogurt, fish, eggs, and whey, in which case your kidneys will be perfectly fine provided you weight train most days.

I just wanted to bring two more quick points into focus.  Most kidney-protein studies are geared towards the common person, not weight trained athletes.  If the average couch potato joe were to intake 300+ grams of protein then the protein not needed for repair WOULD excrete higher than average amounts of nitrogen through urine because your body doesn't need all the nitrogen for muscle repair, it only would need energy.  So, this is why I say it's relative based upon your level and frequency of training.  It would be very unwise to consume excess protein for no reason at all, if your body didn't need it.
 
Next, let's assume someone IS excreting higher than average levels of nitrogen whether because they're in a catabolic state or just eat too much protein for their activity level.  It is up to the scientists to prove it harms the kidneys longterm which simply hasn't been done yet.