Same thing happens in the Jewish community. My father is a Republican and believes that Republicans support Jews because "they support Israel." He doesn't see that the only reasons that Republicans support Israel are because:
- The evangelicals want Israel to exist and be run by Jews so it can be attacked and Jesus can return.
And
- So the right has a place to say Jews really belong (not in America).
They'll "support Israel" all day and night while actively pushing for a Christian Theocracy in America where Jews are (at best) second class citizens.