No, he allegedly hacked into unsecured military systems, using default passwords. He didn't tamper with secure files, he allegedly tampered with unsecured files.
Nobody is saying he doesn't need to face justice, but when the knee jerk reaction of Americans is exactly what you posted, then it's unlikely he would actually get a fair trial on your side of the Atlantic.
He's a UK citizen, accused of misusing a computer in the UK. There is no justification for not allowing him a UK trial, and no justification for leaving this hanging over him (and his family) for a whole decade.