"Christians aren't to be violent towards Muslims or anyone for that matter. But, the doctrine of Islam is one of the enemies of Christ."
First of all Islam is not the enemy of Christ, in fact we are the true followers of him since we are following the commands of his God, as well as the same God of the prophets before Christ and the last Prophet Muhammad, it is in fact Christians who are the enemies of Christ since they are the ones corrupting his message and worshipping him as a God when he is just a mortal who spread the message of God, and performed miracles through the power of God, if he were in this world today he would be totally against the Christian doctrine, because he told his followers not to worship him but only God. As for violence you should review your religion's history toward other religions and beliefs, Christians have committed many atrocities throughout history, yes I am aware of the violent history of Muslims, however Christians are being hypocritical by only pointing out Muslims faults without realizing their own.