You still call them "pigs." That's not help. That's petty namecalling. Giving them advice, however, is helping.

You're still prejudiced against them.

I'm not saying being fat is healthy. I'm saying you and your sub are hateful bigots, which you are.

Definition of bigot, according to Merriam Webster:

a person who strongly and unfairly dislikes other people, ideas, etc. : a bigoted person; especially : a person who hates or refuses to accept the members of a particular group (as a racial or ethnic group) with hatred and intolerance

Notice how it doesn't matter if they can help it or not. (Yes it says especially race or ethnic group but that's because those are the most common types of bigotry) You're still hating an entire group of people.