Politicians, today, are afraid to start or end a speech with a short prayer. That shows me that we are in serious trouble. Diversity is a systematic intentional divider of our population, not a politically correct adhesive.
By dividing us into small groups the larger organized well funded ones are able to break us apart in every area from morality to patriotism.
In principle I agree with you. In this decade, I could support a law that reflected what you say in terms of our immigration. In practice, the government has no right to ask what existing citizens believe. We can ask any damn thing we like of immigrants, though. That's especially true after 19 of them (some illegal) decided that landing aircraft wasn't very interesting. Maybe the terrorists wanted us to opt for more isolation. Suits me fine, but we'll manage that our own way. There's no reason why we have to invite people here to teach them about democracy!