> For example incitement to genocide must be a red line.

I don't think this has to do with why Twitter banned Trump.

> Iran’s leader has repeatedly shared tweets calling Israel a “deadly, cancerous growth” to be “uprooted and destroyed” — all going unchecked by Twitter.

> “The long-lasting virus of Zionism will be uprooted thanks to the determination and faith of the youth,” Khamenei wrote as recently as May.

That's from an article talking about how Twitter defends allowing Iran's Ayatollah Ali Khamenei a platform https://nypost.com/2020/07/29/twitter-defends-blocking-trump...

Clearly Twitter is ok with this kind of political speech, and even defends it.

I'm not commenting on ongoing political matters, but on principle.

I'm replaying to the gay from the video who seems to have a view that all political speech should be protected, no exceptions.

That's clearly wrong, because incitement to genocide must be not be protected.