Glad I was able to start a nice little squabble on here, Makes me feel all warm and tender!
Seriously though, the argumant that it prison won't deter is weak in my opinion. Maybe there should be no punishments for any crimes at all. Obviously it isn't working since people are still going to prison, right?
I don't see the difference. Maybe it won't deter MOST terrorist assholes, but that doesn't mean it still shouldn't be illegal. If laws against murder never deter a single murder, it should STILL be illegal.
In my not so humble opinion
By the way, on top of the 20 years, I think the nutcase should have to do his time with a pig in his jail cell. A nice live pig.