Many federal offices are in buildings that are on public streets rather than on campuses. Do you feel that all traffic passing by the buildings should be checked for IDs because any of them could potentially be a "threat"?
I appreciate your resolve, but turning the nation into a police state is not the way to go.
It's similar to protecting our southern border. Of course each and every single building cannot be protected, so decisions are made on how to place different layers of security at different places. At one facility, a routine ID check might be sufficient. At another, more intrusive security might be necessary. We don't go through metal detectors to get on a greyhound bus, for example, because the threat is not as great and the cost outweighs the benefits. What is frustrating here, again, as in the prior post on granny, is that there seem to be a lot of people who want to do abolutely nothing. I am the last person here who wants anything resembling a police state, but I am for reasonable precautions in a time of war...