Per this resource:
Unlike most murder charges, felony murder doesn’t require the intent to kill, only:
- the intent to commit the underlying felony (the “predicate felony”), and
- that someone died as a result of the felony.
If more than one person participates in the felony, all involved are equally responsible, even those who didn’t cause the death. In some cases, even those who weren’t present when the death occurred are responsible.
Example: Three people agree to burglarize a home; Al and Bill go inside while Carl acts as lookout. When the homeowner discovers the burglars, Bill shoots and kills him. All three are guilty of felony murder, even if Al and Carl didn’t know Bill was armed, and even though Carl was outside the entire time.
From this explanation, it seems that Trump and all 6000 of his insurgents are guilty of murder.