If you are referring to Honesty’s post #12 in this thread, it is quite correct. Most point mutations are either silent (involving redundant codons), affect non-coding parts of the DNA, or cause lethal changes in the protein synthesized. The majority of genetic differences between populations are going to involve such invisible variation, rather than differences that code for proteins. Other genetic differences may result in differences in gene regulation rather than actual changes in the proteins produced. This is not to say that some of the genetic variation between populations doesn’t result in differences in some proteins, but it’s not the predominant kind of variation.
At least from that post, Honesty knows more about genetics than brazil84 does, but I think the average raccoon knows more than brazil84.
Incidentally, brazil84 can’t put me on ignore because I’m a mod. The downside of this is that I can’t put him on ignore either.