In and of himself he is not. What makes him particularly dangerous is that he is the figurehead groomed for this position by the ultra-leftists (e.g. Ayers types) who have been plotting and planning for decades and decades. He is the tip of a much, much bigger iceberg that has remained submerged from view.
Destroying the behemoth FedGov is not the worse thing he could have done. The obstructionist and fascist FedGov is actually a major part of the problem as we see its lawless bureaucracies wielded as blunt instruments against hardworking business owners and enterprising entrepreneurs. Worse is the continuing onslaught against fair & free market capitalism, which is what made this country great in the first place.