Most of the Fat Acceptance Movement will die out in a few years, along with its members.
Are you making a joke about the health of overweight people?
They should really improve their health and lose some weight.
Its messed up to make a statement about overweight people being close to death. No matter what state someone is in health wise, making jokes about someone dying is kid of off limits. Hopefully you understand how the statement you made could make someone who is overweight feel.
They are unhealthy and should lose some weight.
While overweight people should always be willing to lose weight, you being rude about them probably doesn't motivate them at all. Not all fat people are going to die young, and you shouldn't make that assumption with a cruel joke.