If you are really want to for HN to be better place, maybe it's better to fix HN instead of trying to fix HN users.

First, fix problem with down-votes — down-votes are used here to hide alternative views on a problem, from politics to quantum theory.

Second, fix problem with off-topics — create possibility to separate off-topic branches from main branch, so users can discuss their problems without disturbing others.

Third, text contains no emotions or political battles. It's just text. Minor correction of text between two historians can be major insult to you.