Who said they preferred war??
They were given an outcome which met their stated goals - get Osama and shut down the terrorist training camps.
Instead, they added the goal of "secure the oil pipeline from the taliban". You see, we negotiated with them until July of 2001, even giving them a "gift" of 45 million dollars to consider our offer to manage their oil. They declined, and we told UK and India that we would be invading them in mid-October. (Then, 9/11 happened, of course)
So YES, they preferred war. Likewise, Sadaam surrendered to demands 24 hours before we invaded. Instead of accepting victory with ZERO LIVES LOST, we fired a missile into the building he called from, then entered a 3 year war.
Likewise, IRAN is begging us to have peace talks. Syria is begging us for talks. North Korea is begging us for talks. We refuse.
Would Jesus refuse peace talks when they might avoid war?