The rhetoric and goal of Hexbar are clear based on their announcement: to “dismantle western propaganda” and "demolish organizations such as NATO” shows that Hexbar has no intention of "respecting the rules of the community instance in which they are posting/commenting.” It’s to push their beliefs and ideology.

This is quoting the anti-imperialist parts, not the part where they tell them not to brigade or other such things, and saying that those mean hexbear has no intention of respecting the rules!

And if they really had a problem with this, then people that did the same on their instance would not be as Cowbee has pointed out:

Lemmy.world does not care about “idelogical warfare” itself as bad, as there are constant drama farms and prominent users and comms on Lemmy.world that directly state their intent is to push anti-communist views, yet these users are protected, made moderators, etc. Logically, therefore, it’s the views that matter, not the idea of “protecting against brigading.”

The problem is the beliefs and ideology (again why are they highlighting the anti-imperialist, i.e. communist, parts?) not the "pushing" part