PARIS, France — A diplomatic row between the United States and France escalated on Monday when Washington decided to stand firmly behind its ambassador’s criticism of the French response to a rising tide of antisemitism. US Ambassador Charles Kushner, the father of US President Donald Trump’s son-in-law, was ordered to report to the French foreign ministry on Monday over a letter he penned to President Emmanuel Macron, accusing his government of not doing enough to combat antisemitism. It was not immediately clear whether the meeting had taken place, but the summoning nonetheless sparked backlash from the US and Israel. “We...