Conspiracy to use a weapon of mass destruction, use of a weapon of mass destruction, destruction by explosive (in the atomic bomb case) and first degree murder of however many people were killed as a result would be the starting point. Just like they charged McVeigh. Believe it or not, there are lots of laws in place against such activity and thus many charges against it. Acts of war, by centuries old definitions, are committed by nations.
Aside from what the courts would charge him with, Crusader and his ilk would be pissing themselves with glee. They're just praying for another terrorist attack.
Why do you use McVey? McVey was a domestic, a citizen. These people however are not. McVey was a special case in of himself, and his actions.
To continually use McVey is intentionally blurring the lines of distinction between a citizen, and a foreign national.
Yeah, you don't know anything about the law.
Foreign nationals, illegal immigrants, anyone not a US citizen who commits a crime within the US (or on US territory) is tried in US courts and afforded the same rights as a US citizen because they fall under our jurisdiction.
The same is true of US citizens who commit crimes in other countries. That is, and always has been, how the justice system works.