I'd understand the argument if GitHub was an opinion news site of some kind, but the fact is that it's a place where code is shared, code used to create software.
GitHub is a US company but so are many others. To say github is "pushing" to Americanize the world and trump local communities is either foolish or a complete misunderstanding of what github does.
I don't mean to be a jerk but you're really missing the point here and barking up the wrong tree.