LONDON — He kept his cool as foul-mouthed hooligans taunted him on a crowded tram in Manchester, England, one of them demanding that he “get back to Africa.” He became the face of the resolve shown by migrants who have endured xenophobic insults in the tense days since Britain voted last week to leave the European Union. A local newspaper praised him as “SuperJuan.”

Juan Jasso, the victim of a racist tirade that was captured on video and drew international attention on social media, is not of African, Middle Eastern or Eastern European origin — the ancestry of many migrants who have faced recent hostility. He is a 38-year-old Mexican-American from Brownsville, Tex., who has lived in England for 18 years. And it turns out that he supports Britain’s withdrawal from the European bloc.

“I am not eligible to vote, but if done right, I think an exit could be positive,” Mr. Jasso said in a phone interview on Wednesday from The Manchester College, a vocational school where he teaches in the sports science department. “Now, the government has to abide by E.U. rules that may not be in Britain’s interest, and with an exit, they can take back control. Like any decision, you have people for and against. I would vote to leave.”

He added, “The xenophobia that has followed the attack hasn’t changed my view.” He stressed, however, that he was deeply concerned that the vote was being used as a pretext to attack immigrants.