Well, looking at elections worldwide, the far-right isn’t as small as any extremist party should be…

You can use MediaWiki, the official Wikipedia software (it’s open source)…

Is poewiki just the MediaWiki software (IIRC, the name of the software that runs the official Wikipedia) hosted on their own server? For official wikis it can be feasible, for user-made ones it would surely be more difficult than just using Wikia / fandom / etc…