So in general, I agree that moderators who ban people for downvoting are absolutely PTB, and are basically engaging in vote manipulation themselves through their actions.
In this case however, we're looking at an account that has upvoted 1 post and downvoted 49 (With no comment interaction whatsoever) in the span of 3 minutes. This is a pretty clear downvoting account.
This is with you being banned from the same communities 3 days ago, which I understand is great motivation to look at the moderation practices, but the fact that you're posting about another users bans, rather than your own is suspicious with regards to the accusations in this thread of it being your sockpuppet.
If you want to discuss your bans by this mod, I would be interested in the conversation. But this user deserves the ban.