Violence wasn't a terribly effective tactic in terms of gaining women's right to vote.
Civic movements, and WW1, had a greater impact on women gaining the vote (where they did - women have been historically oppressed for millenium, and for some women in our world, the right to vote is relatively recent).
Things that make good movies aren't always historically sound.
Women didn't get the vote because some women put bombs in letter boxes and smashed shop windows.