Do Christians and Muslims Worship the Same God?

After Wheaton College disciplined a professor for wearing a hijab and saying "Christians and Muslims worship the same God," a firestorm of protest and charges of "bigotry" descended on the college. The real problem is that no one believes in religious truth anymore---all that will be allowed is religious opinion, hence, you can't let your opinions offend anyone! But the reality is, this question is vital, and it allows us to go much deeper into what really divides believing Christianity from believing Islam. Hopefully this brief discussion will shed some light on the topic.