Yup

> Nobody's right is being infringed upon here

Of course not, who said otherwise? I just disagree wth the decision taken.

> absolutely relevant to what is and isn't censorship

You don't get to make up your own definition of the word. That someone blocks the speech is censorship, by definition, regardless of whether you can say it elsewhere and regardless of what you might want the definition of the word to be. I'm not going to condescendingly paste the definition here, but it's very clear Microsoft is engaged in censorship here.