Barbara Tuchman wrote that for the English Puritans their true ancestors were the ancient Hebrews,not the inconveniently papist Anglo-Saxons. Cromwell let the Jew back into England about three hundred years after they had been banished. Yes, the English were and are xenophobic, but usually in a nice way. Disraeli was, after all, allowed to be prime minister, even though he was very exotic.
I think the English (at least the Liberals) were more upset by Disraeli’s curled and pomaded hair and the fact that he was a . . . < gasp > novelist . . . than they were because he was of Jewish descent (he was C of E by religion).