All religions are not the same. You could make the case that Nazism was a religion - does that make it just as valid as all the others, and worthy of the same respect and tolerance? (and this is actually a good example, since there are many similarities between Nazism and Islam).
Yes, most religions teach tolerance, peace, and generally being nice to other people. Islam does not - it specifically teaches that torture and murder are encouraged against non-Muslims, and terrorism is part of its core teachings. The Quran also teaches that Muslims should lie about Islam if that is required to gain more converts - something that hardly any other religion (except Scientology, of course) would teach.
Look at every country on Earth that has a large majority of Muslims - they are theocratic dictatorships with horrible human rights. This is actually impossible to avoid - Islam was originally created as a way to take political control, and remains that way.
This is not a "disagreement" between Christians and Muslims - especially since "Christian" nations are typically not ruled by their religious elite. Many European nations have tried to appease Muslim countries, with disastrous results. Muslims have been at war with non-Muslims since the creation of their "religion", and in order to remain Muslim must continue this war until there are no non-Muslims left. Christianity has no such requirement that all non-believers must die.
I would like to see someone make the case that Nazism is a religion. They followed no doctrine of faith, and had no written scriptures. Nazism is a combination of Nationalism, Socialism, and Fascism. Islam and Nazism are in no ways similiar at all.
Furthermore, not all Muslim dominated countries are violent. Have you looked into Saudi Arabia, Pakistan, Jordan, the UAE, Yemen, Oman, Qatar, Syria? The only real extremist Muslim countries are Iran, and formerly Afghanistan. (Iraq did not have any Muslims that were warring with the "infidels").
Beyond the above, Islam is one of the most tolerant religions around. People who say Christianity is apparently forgot about the Crusades, the Inquisition, and the subjugation of the "savage" natives all over Africa, South America, Central America, North America, and the Caribbean.
I said it once, I'll say it again. The problem with the Americans is that all we see are the rioting Muslims, never do we see the moderate side of anything. Of all people, it seems that airsofters should understand that the media blows everything out of proportion and makes situations seem far worse than they actually are.
