I find it odd that people question Trump's commitment to Jews and Israel when he's been the most vocal supporter (only words so far) of Israel we've had in my life time.  They also seem to ignore the fact that his son-in-law is Jewish and his daughter Ivanka converted to Judaism.  The author did acknowledge that there is a disturbing rise of anti-Israel sentiment among college age people.   Another factor could be the rise of Muslim populations in Europe and the USA and that could be the reason why rates of attacks against Jews has been rising in 2014, 2015 and 2016.