He has a PR background so will use many words instead of just a few, hence his criticism of W's statements as "simplistic".
He's also mostly playing to the gallery domestically.
In view of the deeply entrenched anti-Americanism (and Judeophobia) which suffuses British society from top to bottom this is no doubt true.
But a prospective national leader who insults a sitting president is probably going to receive a cold shoulder when he comes knocking on the door of the White house.
Canada's Jean Cretien found that out.