Immigrants are already more liberal on social issues than native Americans, if how we vote is any indication. If we really wanted them to assimilate, we should test them for social conservatism. The problem with this test is that, any opinion will be suspect. I'm glad I immigrated here when there was no such test, so I can say my socially liberal views are as genuine and unselfish as those of any native born American.
You don't understand what immigrants will be targeted by such test, do you?
Hint: not blue-eyed Swedes