The sub got quarantined for numerous rule breaking actions including racism, doxing (inc. Reddit and Imgur employees), sexism, harassment of other subs, and violent threats.
The only way to believe that this has anything to do with supporting a political candidate is simply to ignore all the actual content and posters on that sub.
Compare to /r/AMD_Stock which has a fraction of the size but basically exists to take sides in one of those contentious issues. Most of the time I venture there, I come away with the impression that an outright majority of the comments are shitposts that the community would be better off without. Though I don't think even on that subreddit that I've run into any egregious violations of Reddit policy.
So what? Obviously, it is in poor taste and is a bad look but its just idiots on the internet trying to be edgy and generate outrage.
Knee-jerk reactions to shut them down are exactly what they want and feed off of. Trump himself does the same thing. He says and does things specifically to rile up journalists and the left to cause more chaos and entertain his followers. We should stop falling for it!
Actions and words are two very different things and we shouldn't lose sight of that lest we be stripped of our right to speak our mind.
Unbunch you undies and stop trying to control everyone you don't agree with.