A man filmed himself walking through an airport with a T-shirt that said, “Israel kills children.”

He expressed surprise over being asked to change his T-shirt, saying he was told that the Israeli pilots would be offended. However, he added that since it was not mandatory, just a request for civility, he refused.

“Well, that was at first,” he said into the camera. “After the flight, [I] got pulled over by the flight attendant, or actually the captain, and he said he’s got some Israeli pilot from the next one. So now we’re flying from Amsterdam to Panama, and they feel uncomfortable, and that I should change my shirt. I go, ‘well, is it mandatory?'”

“‘No,’ [the captain said]. I said, “‘Well, I respectfully will continue to wear it because not choosing sides is choosing sides when there’s kids being killed by Israel.'”

Critics have said that accusing Israel of “killing kids” echoes the ancient blood libel that began in Norwich, England, in 1144 and touched off about 800 years of accusations against Jews across Europe and even the Middle East that Jews kill Christian children to use their blood to bake their Passover matzos. Often the accusations were used as a pretext to torture Jews to obtain confessions, which were in turn used as a pretext to massacre or expel them.

Incredibly, the last blood libel occurred as late as 1946.

Returning to Poland after the war, Polish Jews were massacred in the 1946 Kielce pogrom, when a non-Jewish child who had gone missing falsely claimed that he had been held in the basement of the local Jewish committee building to avoid getting into trouble. During the police investigation, the child’s story began to fall apart, including the fact that the Jewish committee building had no basement. Unfortunately, that did not stop the pogrom, in which 42 Jews were killed, convincing many of the survivors that Poland held no future for them.