If instead you are talking of viewpoints or opinions, generally speaking the HN members seem to me quite civil, though there are more than a few topics (usually politics and related, but not only) that for some reasons whenever brought up seem to create very hostile reactions or however an adversarial environment.
If you stay around some time you will surely learn to not touch or comment on them (or be ready to receive downvotes and/or nasty replies if you do).
But on most topics, unless you are (needlessly) snappy or dismissive you shouldn't have problems.
Hint: I'm too addicted to quit. I removed my twitter account but that's it. I only keep FB for marketplace.
* Once a thread reach 100 comments, use the hide button and forget about it. The discussion has probably derailed. (I don't do this, but I try to avoid them.)
* Don't reply to the replies of your comments. (I don't do this. I got many good replies to my comments that fix my errors, but it's easier to just ignore them for a while.)
So I decided that I would start creating content instead of just writing comments. It gives me the same unnecessary rush of dopamine but I am building an audience and making money at least.