Comparing Obama to Hitler is something that the liberal/left used to blame on the Tea Party. However, posters and signs showing Obama with a Hitler moustache were inevitably traced to followers of Lyndon LaRouche. They sometimes tried to portray themselves as conservatives, but in reality LaRouche is a former Marxist who ran for president as a Democrat. They like to cause deliberate political confusion.
Now that an educated Catholic Bishop with knowledge of history and a commitment to religious freedom has made the comparison, however, the national media cannot decide on how to respond.