that’s not the same as leading it himself - protected speech and sitting on your hands is almost certainly not what is meant in 14A

I don’t think you have to be a leader, I think you just have to support the insurrection. I don’t know if you can call doing absolutely nothing to stop it aid, but I think you can argue that many of his comments have been in support of them. But that appears to be a semantic point, anyway.

we push things along fast enough that he’s ineligible under whatever standard SCOTUS sets before election day

If the process they are looking for is a formal declaration by Congress that Jan 6 was an act of insurrection, I don’t think there is a path to that.