https://gizmodo.com/even-the-freest-free-speech-site-still-b...
Also, HN user encryptluks2 says he was banned "for making a post asking how are all the domestic terrorists Trump supporters doing after the capitol riot." They may be able to give you the info to verify.
https://news.ycombinator.com/item?id=26339259
Also, any form of sexual content is banned on gab which is also generally protected free speech. I'm not aware of anyone having been banned for it but I'm sure they are out there, and if not it is easy enough to test.
I'd also like you to consider another possibility - people on the internet lie and distort the truth. A lot. Eg. he may have gotten banned, but not for what he says here on HN. Or he may not have been banned at all but knows he'll get upvotes on HN if he bashes Gab, which was initially backed by YCombinator....until it wasn't. I'll let you figure out why they stopped supporting them.
I've been on Gab since its inception - the only type of comments/users that get booted are those who engage in illegal speech. Illegal speech != distasteful/hateful/politically-charged/racist/sexist/divisive/etc.
https://www.uscourts.gov/about-federal-courts/educational-re...
Is hate speech right? In most cases, probably not unless you're saying things like "f..k all pedophiles who rape children", then it's righteously motivated. Is it legal? Yes. This is a very important distinction and what gives the USA its unique character and distinguishing trait among ALL other nations who do not have these types of freedoms codified in their constitutions...in fact, in many countries you'd be sacked quietly for saying the "wrong" thing - where "wrong" is defined by whomever happens to be in power (e.g. Russia, China come to mind)