Then we have learned NOTHING from the Israeli experience - shooters and bombers could walk into crowded terminal areas and kill dozens of people. I can't believe we haven't instituted remote security checks at our airports yet.
I'd much rather take the chance of being blown away than have to give up the freedom that you suggest!
What are you gonna do?
At least inside the building they are controlled. If you do it outside in the parking lot there are cars and all kinds of variables. If you put the checkpoint somewhere else then people are still congregating there. And wherever there is a crowd there is a potential terror target.
Look, if someone wants to get you they will. They certainly can and that's all there is to it. Just relax and enjoy the 4th, and if your number comes up you will be the first to know. Till then don't worry about it. Your mind can come up with much worse scenarios than those you will face in real life 99.9% of the time.