TD isn't meant to be a bastion of free speech. It's candidate support website. They say it in the sidebar: "This is a forum for supporters of Trump ONLY". They obviously won't allow anything which does NOT support Trump. /r/politics is supposed to be a neural subreddit, is not even close to it.
It's a forum dedicated to a certain political candidate and their views. By definition, such a place will be an echo chamber with a (usually) low regard for neutrality.
It's no different from a hobby forum simply not tolerating people who don't like that hobby. You don't go to say, a Microsoft specific forum and expect to hear why Apple or Linux operating systems are better. And if you did keep saying that, you'd probably be chucked out or flamed to a crisp.
And if by take it with a grain of salt you mean that nothing in there is actually relevant or related to reality.