the assumptions are not because he is fat, Kimmi. the assumptions are because he came into camp
1: heavier than he was last year
2: heavier than his own camp said he was and
3: far heavier than what he promised to report to camp weighing
Weight is a secondary issue here. The real issue is that yet again, Pablo Sandoval is not what he advertised himself to be, he did not keep his promises to the franchise to try to keep his weight under control, and he put the team in a bind by his own decisions and actions. If a player had a simplar problem with alcoholism that put the team in a bind because the player was not able to perform his duty, the reaction both by the team and by the fans would have been the same.
Of course there will be some additional juvenile immaturity because the problem is specifically his weight, believe me I get that, I've been severely overweight for most of my life. The difference is I didn't sign a contract to perform as a professional athlete, a job that requires physical fitness, and then proceed to completely fail to take care of myself, report into camp well above what the team expected me to weigh, and expect everyone to be fine with this.
The weight is secondary here. Broken promises and a player showing up in unexpectedly poor health and in no shape to do the job he's paid for are the real problems, and the sense that since the problem is weight-based, it's also self-inflicted, doesn't help (sometimes that's true, sometimes it isn't, but if Pablo literally can't contain his weight, that's even a bigger problem for the team as he's even less likely to be able to return to playable condition if that is true).