I'm afraid these kinds of crimes are going to increase as anti-Jewish hatred seems to be increasing in the USA.
What surprises me is that most recent crimes took place in North East Coast. Neo-Nazi march took place in Trenton last year. A puerto-rican was charged for car-bombing in Brooklyn in October. Two weeks earlier, a self-hating scum conspired to bomb synagogues in New Jersey. And here is an Italian-American in Jersey again.
This is nothing, however, to the threat Barack Hussein Osama represents by polluting the White House.