From what I read these emails are a non issue. Its basically talking about whether security measures should be race neutral. They discuss using race as a factor in the interm until they could build/implement a security system, whether the race should be the final security system they set up, and how constitutional both of those are. Kavanaugh gives the amswers you want to hear which is that the Equal Protections Act requires them to atleast try to implement a race neutral system. In the interm case they cite national security as a defense that will work.
Personally I have no problem using race as a factor morally, but constituionally I agree with what Kavanaugh said. Its probably not constitutional but I would focus my security on foreign born muslims and the children of immigrants from muslim countries. By the time we get to the second generation born in America I thinm we can ease off. With muslims I worry about their kids combining teenage ansgt with radical muslims clerics preaching Jihad online.
I am still grateful to Booker for releasing this. We deserve to know far more about our governments inner dealings than they let us. Its not the case here but often stuff gets redactes or clsssifies undee national security rrssons because releasing the info would embarass a government agency thus reducing public confidence/trust in them which they claim will make it harder for them to do their job. That is bullcrap. I dont care if its damning info about my guy Ron/ Rand Paul, we deserve to know.