There are Muslims all over the world condemning terrorism on a continuous basis... that doesn't mean that American media is going to fall all over itself reporting that. Go request a fatwa from any respected Islamic scholar, and see for yourself.
And the mainstream interpretation of the Quran is that jihad is solely for defensive purposes, and that the bloody conquests of Mohammed and his followers were a special dispensation from Allah in the initial spread of Islam. Muslims today are called to convert through persuasion and example, not the sword.
Islam does not go as far as Christianity, at least in teaching anyway, with regard to the treatment of unbelievers. Islam teaches that while Jews and Christians are deserving of protection, they are not to be treated with the same respect as fellow Muslims. Others, termed "polytheists," even though they coulds be atheists or anything else, are accorded no respect whatsoever.
In the real world, how Muslims treat people just depends. Iraqi Christians are having a hard time because Saddam Hussein protected them, so now they are a target. Iran is more tolerant of the church than one might expect, and regards several old Persian churches as cultural tresures. The Syrians as we all know have a record of oppression against the Maronites in Lebanon. The Turks tried to exterminate the Armenian Christians, but today count their history in the early days of the Christian faith as a cultural treasure, and have made the Hagia Sophia a museum, with the old Byzantine frescoes undergoing restoration.
In Egypt and some other North African countries, as well as places like Jordan and up into Central Asia, Christians and Muslims have lived together for a long time, and Muslims usually don't bother adhering to the distinctions their faith calls for them to make, because the Christians are their friends.
In Palestine, most of the Christians fled in 1948. The few who remain hate Israelis just as much as the Muslims do, and fight side-by-side.
In Sudan, the Arab Muslims in power have been trying to extreminate the African Christians for years, long before the situation in darfur got worldwide attention.
It just depends upon the community. Now that even Arab Christians are being associated with the West, they are facing greater persecution than in the past.
As for Christianity, well, people who are hostile to the faith like to take individual verses from the Bible out of context and throw them in the face of Christians. Then, when Christians respond with an orthodox interpretation of the verses in question, those hostile call it "making excuses." This is because they aren't interested in any kind of legitimate debate. Agnostics and atheists can be dogmatic, just as the religious can.