The content is important though because it's precisely why they weren't allowed the hashtag. They were allowed other hashtags that didn't have the same negativ

The content is important though because it's precisely why they weren't allowed the hashtag. They were allowed other hashtags that didn't have the same negative "attack ad" approach so it doesn't look like politically motivated bias so much as them just not wanting to promote negative attack ads on their platform. You can call it censorship. That's fair. But it's unfair to call it bias or politically motivated censorship.