I don't mean that's likely to happen. But if history is anything to go by, when people are prevented from expressing their opinions via peaceful means, they often try to find other ways to do it and usually that means violence. Imagine if the situation was flipped here and you weren't allowed to say anything pro LGBT. Whenever someone posts something in support of LGBT rights they get called by the police because someone felt their post was hateful. If you believed strongly in LGBT rights would you simply be quiet on that matter or would you try expressing your opinion via other means? Some people would take to more direct forms of activism possibly including violence against MP's who were known to be anti LGBT, and they would justify that violence by saying the normal peaceful means of expressing their opinion was closed off to them.
Do you think gays would have equal rights in law today if people in the past had that attitude? Without smartphone cameras and cctv everywhere it was much easier for gay people in the past to hide their sexuality and have secret liaisons. They could have lived their lives without ever speaking out about it, but some felt that it was a cause worth speaking out about, they believed in it so much they kept discussing it and bringing it into the spotlight and eventually they got the law changed. All because men and women decided they wanted to speak out about something they felt was wrong, rather than just live their life peacefully without speaking about it.
There is a lot of hatred and threats directed at people who come out with anti LGBT opinions these days, that it would be far easier to just keep quiet if you have those views. But if people still express those opinions in spite of all that, then it must be a cause they really believe strongly in. And while I don't agree with what they're saying I tolerate and respect their right to have it.