Yet I can still discern that even the mob tends to have patriotic ties to the ol US of A, slide a container or two off onto an ill-tracked truck laden with consumables and easily marketable wares generally with an incentive for materialism,..., whereas our Arab brethren might more easily pass a dirty bomb or two through the terminal with an incentive to praise Allah while slaughtering infidels.
I find the former the lessor of two evils.
Let's look at history, for examples which you either don't know anything about, or choose to ignore. Ever hear of Mussolini? Are you at all aware of who we, THE ALLIES, fought in WW II? Many "mad men" LOVED him and America be damned. Oh yeah, "patriotism" came into play; just for the wrong country.
Some longshoremen ARE patriots; some aren't.
The "dirty bomb"/ nuke fear, is that of a small child and bogeymen under the bed. It would be far easier to sneak a "dirty bomb into this country, across the Canadian border, than in a cargo ship!