I think fat people should lose weight so they can be healthier.
Do you have good healthy habits?
I was very fit and my healthy habits usually don't vary too much.
It's good that you're worried about the health of others, and being overweight can cause health problems. Just keep in mind that most people aren't deliberately overweight, and they're already aware of the health risks associated with being overweight. Don't accuse them of being deliberately unhealthy, or you're likely to offend them.
I disagree I think some of them are too stupid and lazy.
I am not disagreeing that losing weight would not be a good thing. It is unfair to call people names and judge them with out knowing their circumstances. You wouldn't call someone with the medical condition lymphedema fat because the excess weigh is created by water.