Who exactly claimed to support anyone saying anything? Or are you claiming that supporting "freedom of speech" implies that one must support anyone saying anything?

Only anarchists support that. Nobody else supports absolute free speech. Not even the self described "free speech absolutists". I mean, they support only until they are not affected by it negatively.

Supporting another's right to something doesn't entail helping them exercise that right, and not facilitating their exercise doesn't call into question your support for the right itself.

Who said anything about not allowing people to say something?

In the real world, if a dickhead spouts garbage you tell them to fuck off. Doesn't mean that they can't open their mouth, just that you don't want them to do it near you. A huge proportion of people online who claim that their freedom of expression is being impinged upon are dickheads who were told to fuck off.