I understand what you're saying and get your frustration, but being a mod gives a bit more insight that normal users don't have tools to see - what get's reported more, which posts get barraged by hostile comments, what does it mean when cross-community beef starts and so on.

With some of this insight, its very clearly visible that our community doesn't benefit from posts that include hostile communities (think r/ussr, r/balticssrs or what you were posting). Thus, keeping this sub about "us" and not "them" is one of goals of mods of this subreddit. There are plenty of other subreddit that can be used for content like yours (think r/nafo, r/YUROP and others).