"confused" is a pretty generous reading of the situation. They just don't want anyone here from outside the US. Or anyone who isn't white, really. If they don't have a justification for kicking someone out they'll make one up or just use it as a way of scaring other people. Too many hispanic people are being picked up outside their immigration court hearings or lawyer's offices while trying to immigrate "the right way" for it to be confusion or coincidence.