The internet remains a bastion of free speech. Reddit, Facebook, Twitter, remain privately managed companies with a duty to police their platforms. If /r/The_Donald contributors are upset - they can go almost anywhere else. Vitriol, hate, disinformation, etc... just doesn't need to be on public display.
The problem is that what hate is, is in the eye of the beholder. People can say Trump wanting to enforce rule of law is hate, I don't think so. People can say Trump wanting to enforce our borders is hate, and I don't think so. You have politically motivated people who think that anything that disagrees with their political viewpoints is hate, and justification to be memoryholed from the internet. I don't agree.
That's right. Who defines hate speech? Where do you draw the line? I guess as soon as one incites violence no matter what side of the political spectrum it is from, that is out of order.