Wrong. Such an action is by definition treason, and is explicitly covered under our Constitution:
Article III, Section. 3:
"Treason against the United States, shall consist only in levying War against them, or in adhering to their Enemies, giving them Aid and Comfort. No Person shall be convicted of Treason unless on the Testimony of two Witnesses to the same overt Act, or on Confession in open Court.
Note:
1. Treason is by constitutinal definition "levying War against (the United States)".
2. "conviction of Treason" is included. One must have a trial to be convicted.
3. If treason were grounds for forfeiting citizenship, the Constitution would have enumerated the power for the government to do so. It mentions no such power. Since our governmnet enjoys only enumerated rights, the omission of stripping citienship from allegedly treasonous Americans means that power does not exist.
The proper and constitutional solution to the Padilla case is to try him for treason, then hang him when he is convicted.
Yup
You got it! Just like we did with Marin Johnny Jihad, RIP! We'd never put such vermin in prison so they can recruit more terrorists to their cause, would we?! Slap on the wrist? Maybe in some country with one million lawyers and the populace idiotized by television, repeating mindlessly some nonsense about Miranda's rights and innocence until proven guilty, but never here!