Since I primarily see the canned response of "they can build their own youtube if they don't like it", I'll rephrase to help get your actual point across:

Imagine if Hitler were currently alive and rising to power in Germany, and imagine if Silicon Valley were located in Germany. Would you be ok with Silicon Valley de-platforming and doing everything in their power to silence the Nazi-opposition political party? And knowing what's about to come, do you think the stance of "they can build their own communication systems" would be beneficial to humanity as a whole?

I'm aware this is kind of extreme but there are multiple responses that missed the point.