> Why are people so offended by Crossfit? Who cares what
    > other people do to get in shape? [snip] Why is Crossfit
    > special?

Because there is a perception that Crossfit aficionados spend an inordinate amount of time telling everyone else how Crossfit is the One True Sport and that everyone else is fat and stupid for not doing Crossfit.

Proselytizing people should probably prepare for pushback.