It is easy to be comfortable in a place where most anti-semitism comes from a political organization dominated by frei Jews, who themselves are very marginalized in the overall political system (e.g. Chuck Schumer and his party are only big in a few regions, but someone like him will never be have any real power).
It is easy to be comfortable in a country where religious toleration is deeply ingrained in the national psyche.
Should I mention that three groups have tried to destroy us in the last century (the Nazis, the Communists, and the radical Islamic movement), and it was the Americans, who themselves weren’t really threatened, and went out and defeated our enemies. When we see the history of America, we say proof of Ha-Shem manipulating history to save us.