Spain of course being one of the worst, having expelled and exterminated its Jews via the Inquisition in 1492, forcing those they didn't expel or kill to convert to Catholicism. The overwhelming majority of the Jewish descendents of those expelled from Spain today live in the state of Israel, their ancestors having been expelled/exterminated from at least one place in the intervening period.
Spain apparently hasn't changed much in the intervening 500 years. Apparently now some anti-Semitic external elements have been given permission to work with youngsters in the Spanish education system, resulting in these letters from 5 and 6 year olds:
The Israeli embassy in Madrid has received dozens of postcards addressed to the Israeli envoy - from students ages 5 and 6 - including hand-written messages such as "Jews kill for money," "Evacuate the country for Palestinians," and "Go to someplace where someone will be willing to accept you."
Perhaps Spain should take in Palestinian refugees as full citizens, then. They still owe the Jewish people a major debt, having not paid any restitution for the 1492 expulsion/Inquisition/etc.