Islam does not preach any sort of ongoing war with neighbors nor does it refer to Christians as polytheists. These are just more examples of your ignorance about Islam.
"Surely those who believe, and those who are Jews, and the Christians, and the Sabians -- whoever believes in God and the Last Day and does good, they shall have their reward from their Lord. And there will be no fear for them, nor shall they grieve" (Quran 2:62)
"If only they [i.e. Christians] had stood fast by the Law, the Gospel, and all the revelation that was sent to them from their Lord, they would have enjoyed happiness from every side. There is from among them a party on the right course, but many of them follow a course that is evil" (Quran 5:66)