Yep, and facebook too, yet it's very clearly within the ability of both companies to have their algorithms and people categorise non universally mainstream content and only censor what's appropriate to the society that's viewing it.
It's not quite the same thing but a company like netflix offers different shows in different countries, spotify's the same for songs. This is more down to licensing than censorship and the scale is quite different from social media but it's a demonstration on how a company can provide different content per region.
Of course, if you flip the argument on it's head, we're annoyed that a company like Google is censoring things which are allowed or common place in society outside of the US. we wouldn't want google censoring content that we consider "enlightened" into countries which we consider backwards (which they no doubt do) and that's always the hypocrisy of these positions.