Him doing it once on Twitter is enough to make the point that the comparison between Biden's droning outside of Twitter and Alex's claim on it isn't the same for violating whatever twitter ban rules, since ideally Twitter would only ban for what is posted in it.
To play devil's advocate, Biden didn't kill anyone on twitter. Alex has (presumably) posted his Sandy Hook stuff there.
Insert the funny adage about presuming here
He rarely said anything about Sandy Hook being full of crisis actors on his show, let alone on twitter. Its not even something he personally believes.
Him doing it once on Twitter is enough to make the point that the comparison between Biden's droning outside of Twitter and Alex's claim on it isn't the same for violating whatever twitter ban rules, since ideally Twitter would only ban for what is posted in it.