While I don't think that it's what Lieberman meant, I gotta say I agree with the idea of stripping the citizenship of someone who's been convicted (bolded, because I know someone's going to miss it otherwise) of terrorism on behalf of another nation or on behalf of a foreign organization, regardless of whether they're naturalized or native born.

What's problematic is what to do with them after that.

Apparently he thinks domestic terrorist organizations should get a free pass.

I'm not defending him, but I don't see that he said anything like that.