No, it's not about "intolerant of people who are intolerant". There are actually a lot of people who are actually intolerant which are tolerated much better than a conservative in a liberal environment. Surely, the disagreement may be deeper on fundamentals, but the everyday tolerance would be worse.

> There's no reason anyone has to respect ethno-nationalist views against immigrants.

There's something called "political Turing test". The essence is that if you can not convincingly describe a position of an opposing side - in a way that they'd agree it is close to what they believe in - then you are not fit to discuss this position intelligently. Unfortunately, from the video is pretty clear almost nobody of those who spoke there would pass this test on anything related to anybody who voted for Trump. Yet they feel fully entitled to deny basic respect to people they didn't even bother to understand. And yet they feel smugly morally superior about it.