Ignore them.
Obesity is GENERALLY a sign of lack of self esteem. Yeah some people got injuries that prevent them from exercising or shyt like Thyroid problems but I've seen asthmatics run half marathons and I knew a few personally who have done bike tours.
There's also that smart dumb shyt that's prevalent in lesser educated circles where because a few quacks exist and may prescribe bad medications to unsuspecting rubes, that "Modern Medicine is a scam".
Let me assure you that is not the case and when you hit your late 50's and 60's pay attention to the cats who parrot that kind of mindset as well as the ones who did not lead active lifestyles in their 20's, 30's, and 40's.
You'll see that it's those people that develop diabetes, certain kinds of cancers, and have heart disease and high blood pressure. They'll tell you some horse shyt that you had good genetics and maybe that's true for a small portion of the population but it's not the standard.
No one is saying you have to subsist on a grain of rice and a bubble of dew from the morning grass or take 67 different supplements 3 times a day everyday at the same time...shyt I plan on having an embarrassingly large hamburger and a few beers while watching the Giants game on Sunday. But that's because I've earned that meal via cardio, lifting, and other shyt.
compared to other groups....Diabetes too 
....don't get me on how blk folks are terrible at managing diabetes when they are diagnosed 
.
