First of all, you didn't answer my question about referring to the obese as "subhuman". Moving on...
Obesity generates a lot of healthcare expenses, yes. Guess what else does? Living an extra 20 years and potentially being saddled with dementia, cancer, assisted living, etc. Those studies only looked at the healthcare costs of the obese, but never compared them to other groups - say, the normal healthy population, or smokers.
Lifetime Medical Costs of Obesity: Prevention No Cure for Increasing Health Expenditure
Now, since that seems to be the biggest source of your discontent (and oddly, anger), surely you've changed your mind?
Smokers who have children are more likely to smoke. Same goes for the children of Christians, alcoholics, people with psychological issues, people who are skinny but not physically active, people with low IQ scores, etc. Pretty much anything a parent does influences their child - but where's your outrage against those parents?
They have great influence? How do you quantify that? What measures of influence are you using?
Statistically they're not normal, in that they're in the minority of the world's population, but I don't see any reason to consider them subhuman.
The world is full of bad influences. If you're a parent, it's your job to teach your kids to not let society dictate what they should do. If you can't do that, maybe having kids isn't a great idea.