So now two Greens have shouted out during recent presidential speeches, one was booed, one was removed and censured.

What’s the difference?
Skin color of the representative, and skin thickness of the president.

The president was elected by the thinnest margin since Bush lost (but the Supreme Court handed him a win), 1.5% (and under 50% of the vote). Under 50% is not a mandate for anything, especially things you said were off limits in your campaign.

May I also suggest one's a matter of decorum, the other drunk on autocractic power and intent on punish any dissent?

Moving this video to BSR's personal queue. It failed to receive enough votes to get sifted up to the front page within 2 days.