This is a health myth. There were a couple studies long ago that seemed to suggest that high protein could be related to kidney problems, but have since been proven to be inaccurate. Protein can elevate your Urea levels but this is not an indicator of kidney damage. Your Urea is simply a breakdown product of protein. We have seen countless people recover their kidney health an all meat diets. Check out Ken Berry's in depth breakdown of the subject:
Ken Berry on Protein and Kidney Disease