But you're literally debating it right now.

Vivek Ramaswamy is running for president and polling decently on a platform that includes defunding Ukraine. He was able to debate this on live national television, and also on numerous appearances on YouTube and other media, without being censored or punitized in any way (except for the obvious consequence that most sane people won't vote for him).

I don't think "censorship" is the frame you want to put around this issue.