The concept is that in the face of a common enemy dedicated to destroying us, we would cast aside or differences and work together to preserve ourselves.
70 years ago, maybe.
Now, we not only coddle the common enemy of islam, but we invite it in, give it special privileges and protections and generally enable the enemy to undermine us politically and physically.
Even if aliens acted like on “Independence Day” the cowards in Congress and the executive branch, and liberals all over the would say it was our fault the aliens attacked because we “disrespected” them.
Negative, they would say it’s because we were destroying the earth that the aliens came along to righteously punish and eradicate us, and why didn’t we support their global warming bills?