The only problem with that logic is that some of our enemies are 40 year old white-male converts from the United States of America.
While this is interesting it is an annomally and he is not
'our enemy', according to the prosecutors and the Israeli's to commit the acts abroad. And notice that it was the Israeli's who caught him (they profile their air passengers).
Some people do not become enemies until they commit some atrocity against us. All it takes is one American death in one of their abroad attacks. Why do you think Americans are such easier targets abroad? Because security in those places are lacking. Americans and Israelis are prime targets for extremist organizations.
The Israelis din't really catch him, they just denied him entry. He was still able to get around. The Israelis didn't exactly elaborate on how they came to the conclusion to deny him entry. Perhaps the got intelligence frm the U.S. about him and they (the Israelis) made a decision that perhaps kept their country safe. And perhaps they too knew he was going abroad and getting training. The Israelis perhaps have some of the best intelligence of any country in the world and I am sure they feed some to us.
He is our enemy, he is practicing and advocating the very thing our country is fighting for in Afghanistan, and our people are dying. It is likely that it would have taken only a matter of time before he turned his guns and detonators on us, and he lived only a hop, skip, and a jump away.
John Walker Lindh was not an enemy of the state until he helped kill Americans. He is lucky he didn't get the death penalty for being a traitor. He may not have even pulled a trigger, but in our country, being an accessory to murder is almost the same as committing murder.
As for profiling, it should remain and perhaps even be expanded but it should not be used along with random checks as our only defense at airports. A total system sweep of all passengers. It can be made better and faster. I implore the government or some enterprising company to work on it and figure it out.