Because to do so is good for socialism.
Actually the reason Perry is in trouble is because his campaign is so knee jerk arrogant and unthinkingly stupid they think anyone who criticizes him is "the enemy.
Odd, that is exactly the SAME tactic the Leftist propaganda bots have been trying to to use against Conservatives for decades. When Conservatives see someone supposedly on our side using the same tactics, it makes us wonder what they are trying to hide.
Remarkable moronic campaign tactics for anyone to scream abuse at people then turn around and ask those same people you are abusing to vote for your chosen candidate.