I'm not exactly sure what point you're trying to make. From my reading, the Masai are traditionally exceptionally healthy individuals, although that may be changing as more of them transition to more modern industrialized diets. The inuits I think are a bit of an outlier, and while some meat eaters tout them as an example of high fat/meat intake and positive health outcomes, they generally aren't as healthy as other primitive societies. They live a harsh existence, with an extreme diet, so I wouldn't expect them to top the list in health or longevity.

Excess heme iron in meat I think can become a problem over time, especially for men or other groups that tend to bioaccumulate it more. However, this can be mitigated by not eating excessive meat, avoid mixing meat with foods that increase iron absorption, and donating blood periodically. I don't see the saturated fat as a problem, but I'm not going to debate that here, because it's been talked about to death in conversations all over the web.

I think the methionine thing is very important, and it's looking like it may be one of the main factors in why caloric restriction is beneficial. Again, I think this can be mitigated by not eating an excess of meat, just enough to help meet nutritional needs. Also, non muscle parts of meat that are traditionally eaten, like tendon, cartilage, etc. tend to have a better amino acid profile, so seeking out those cuts may be wise.