She didn't even really compare anyone to terrorists, her point was that some of the archaic thinking is expected from more extremist groups.
there are much much much better ways for her to make the point that women spent the 20th century fighting for many freedoms and now in the 21st century they arent going to give them up to some GOPers who sound like they want to take women back to the 19th, 18th and some even to Medieval times.
Bottom line is when you mention terrorists it is like mentioning nazis. It is a conversation stopper. It is stupid and she shouldn't have done it. Her 'gaffe' and questions over whether she should apologize become the story.