There are some things that I won't ever defend your right of saying them, to be honest.

A right to say something is not the same as the right to say (and do) something without being called out on it.

He has the right to do what he’s doing. Other people have the right to react and say “That sucks, it’s against my values, I no longer trust you or want to do business with you.”

We need to add something to this nice rule about using services that are good from people we don't (fully) agree with.

I'm not personally inclined to be so strict about this, but there are people with objections against the Proton CEO who once agreed with Trump on twitter, or DHH (there is this one blogpost about his extreme views). Etc.