Kinda harsh response to somebody with autism.
Now if he’d asked why you LET yourself get so FAT… (Did he?) Did he ask whether you thought it was OK to look like a slob? Did he ask you whether your realized that you were putting your health at risk? Did he say he couldn’t respect you anymore because you are disgusting now. Because in the he first line you said he asked “Why did you gain so much weight?”
I’m guessing there must have been more to his message that indicated that it wasn’t just an innocent question from a concerned, socially inept, non-PC obsessed fan.
Personally, I think you look pretty good. (except for that last picture of you with the “fuck you” dimples. That one looks pretty foolish)