They pay the bills, and it's only on their instance -- a topic-based instance at that. And that topic is not politics.
If they don't want that kind of braindead inflammatory political crap from, well....you, then that's their right.
No one is obligated to platform you, your opinions, or your political propaganda....especially not on their dime.
And, really, let's face it. You only posted that garbage here to spread it. So you're basically pissed and calling their actions "election interference' because they wouldn't let you do that yourself.
Also also: mentions in the post body don't work. So your "let's spam the manager" mentions in the body are useless.