This is war! For the duration, we are going to have to give up some of the civil rights we have become accustomed to. We had better be prepared to lose some of our civil rights temporarily, or we will most certainly lose all of them, permanently.
And, don't worry that it is a slippery slope. We gave up plenty of civil rights during WWII, and immediately restored them after the victory, and in fact, added many more since then.
We won't quote Ben Franklin. Our choice is H. L. Mencken:
I believe that any man who takes the liberty of another into his keeping is bound to become a tyrant, and that any man who yields up his liberty, in however slight the measure, is bound to become a slave.