Ok, we all saw what we saw. “Insurrection or rebellion”, did you see the flags those folks were flying? Or yelling “it’s 1776”? Sure looks like it to me. “Aid and comfort”? Sitting with his thumb up his ass for hours sure seems like aid, and as for comfort, well, saying “We love you, you’re very special” appears to qualify, not to mention dangling the prospect of pardons.
As for the Amnesty Act, you can’t amnesty folks for offenses that haven’t happened yet. If that Civil War era law applies to every insurrection or rebellion going forward, what you have is, fundamentally, the Constitution being amended to eliminate Section 3. without going through the amendment process. Nope.