I don't think you are shadowbanned, i can see your comment. You're welcome on HN anytime you want to come back. Btw., when i first came accross HN, some 10 years ago, i had this same fear of being shadowbanned. Heh.
GP was banned by dang for "ideological battle": https://news.ycombinator.com/item?id=26809778
GP obviously has strong political views. I don't think the problem is necessarily that they have those strong views, but they could learn how to express them in ways that sound more constructive and less confrontational. I think it is the confrontational tone, combined with the fact that they don't comment much on non-political topics, which leads to the "ideological battle" label, and consequent ban.