You do not want me to take it personally, but then you have to insult me personally. Are you schizophrenic or do you just have a knack for talking out of both sides of your mouth?
And for the record, pal, since you seem so keen on the use of logic: If you do not like sitting next to a fat person, you can move. If you do not want to move, you can keep your mouth shut. As far as overweight people are concerned, it is neither their fault nor their problem if you do not like sitting next to them. That is what it all comes down to: YOU, not them.