What to do to protect freedom of speech

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Toronto police threaten to arrest Menzies for questioning the protest of Iranian general Qassem Soleimani being killed, for calling him terrorist.

https://www.theblaze.com/news/toront...as-a-terrorist

I feel a threat to freedom of speech has occured. I'm starting to believe that for some people, freedom of speech is nothing more than a political weapon to claim if they feel ignored or want to push their views, but say it is not absolute if it threatens or does not suit their political or idiological views.

I'd like to somehow stand up against this kind of behavior. It makes me ill, especially when our gov't is guiltly of this. We need to somehow protest this kind of behavior. I think I'll write my MP.