That those kinds of situations are exactly why free speech exists: People want to articulate thoughts in front of an audience that is opposed to them. What they are saying may be bad (depending on your PoV), but the fact that they can invoke free speech to say it is important (excl. harmful stuff like hate speech ofc).

Claiming to support free speech when nothing controversial is being said is just cheap talk.

I disagree with what you say, but I'm glad you're free to say it.