Because they can't control themselves and project those feelings onto others.
In a discussion on Twitter w/ one of their more 'moderate' supporters, one who believes that 'gun control' is about keeping guns out of the hands of criminals, regarding the CSGV's double standards to silly political rhetoric, I began to show that the CSGV wasn't interested in 'crime control' but are really just the gun banning fanatics we all know them to be.
Well Ladd (AKA GritsJr) couldn't let the truth come out so he responded w/ his usual attempts at intimidation and character attacks in order to change the subject.
And as usual, when asked to provide any evidence whatsoever of his allegations, he scurried back into his hole.
This is the leadership of gun control in action.