“You know this is discrimination, right?” said Hensley.
Yes, it is. But it's entirely legal discrimination, because political ideology isn't a protected class.
I'd be perfectly fine with this if it worked both ways. If you're allowed to discriminate based on politics, you should be also allowed to discriminate based on race and gender. Alternatively, no discrimination at all - no matter the reason
Somebody needs to read and understand the paradox of tolerance.
A tolerant society can tolerate anyone in the society except for the intolerant members of the society.
They were ejecting those people because they were intolerant of the people that the space was made for.