It is not a constitutional issue nor is it an issue of "authority". We are not talking about the War Powers Act for God's sake. Quite simply, it is accepted foreign policy and has been for some time now that American presidents lend at least verbal support to their allies. They don't have to, they are not authorized to constitutionally, supporitng allies is part of foreign policy.
Seriously, you will get banned here sooner or later for your jew-bashing, so why don't you just leave quietly?
It is a constitutional issue. If GWB has been working for Israel, he should be impeached.