Or was he intentionally using the term "crusade" as an allusion to what's coming.
All my Moslem friends are generally very peaceful and honorable, but like Christians, will fight. Like radical Christians and Jews, the Moslems all 3 religions believe also in the same God, but selectively pick portions of the Koran/Bible to justify their hegonomy.
I just picked this one as one of the passages which 'justifies' their actions. Remember too that all non-christians are going to hell, and 'an eye for an eye, a tooth for a tooth.'
I think W just made a normal choice of his normal vocabulary in choosing the word 'crusade'. Just a long term 'war', not a single battle. Unfortunately, it was taken in the meaning used in the middle-ages. He is now using the synonym, for his meaning, 'campaign'.
Out of respect for other peaceful folks even if they hold ignorant and illogical beliefs. It is traditional practice in the US.