The irony of antisemitism in America is the way our nation’s founders worked to create a safe haven for all, including Jews. In the 1630s, Rev. Roger Williams, a Puritan leader who didn’t get along with fellow Puritans in Massachusetts, created the colony of Rhode Island, specifically as a haven of conscience. William Penn expanded this idea territorially when he created the colony of Pennsylvania — a “holy experiment,” where people could practice their faith without fear of punishment. Christians, by and large, founded America for religious freedom — and extended that religious freedom to others, including Jews. George Washington...