There is a LOT going on here besides vandalism. Assault, hate crimes, Hamas recruitment...

It seems to me there is sufficient evidence of an overarching organization of sorts coordinating, funding, and traveling across state lines to incite violence and commit hate crimes.

Assault is a state crime (unless it's committed in a federal place or against a federal official). There almost certainly hasn't been enough time yet for the investigation to reach the point where the FBI would be called in on any of the other stuff. They just arrested these folks last night - law enforcement almost certainly didn't even have their names until then, let alone enough time to figure out whether any of these people were involved with all that stuff.

But it's highly unlikely that there's any federal crimes here. Odds are pretty low that any of these folks committed any criminal acts across state lines (it's not the person travelling across a state line, the criminal activity has to be committed across the state line). There's almost certainly no federal hate crimes involved here because you only have property crimes and/or resisting arrest - the general hate crime laws require a criminal attack attempting to cause bodily injury to a person, and the specific ones that encompass property crimes (like defacing religious buildings) don't apply here.

If there was any evidence that these individuals were involved in Hamas recruiting, you could call in the FBI - but again, there's almost certainly not been enough time for any of that information to really have been collected yet.