Why do you say that? Comparing being a Republican to being persecuted in a concentration camp is deeply offensive to most Jews (and others). And apparently fans had been upset with other comments she'd made for months before she was fired.
“In response to the offending Instagram post, in which Carano compared being Republican today with being Jewish during the Holocaust, Lucasfilm announced that the actor is no longer a part of the show’s cast and called her remarks “abhorrent and unacceptable”.”