Killing one person is murder, killing 100,000 is foreign policy
There are similar demands made in the OT but the New Testament, which doesn't say anything about killing non-believers, is what Christians (hence the name) now follow.
If you want to defend Muslims you might try another tack than attacking Christians. This is not a religious war, at least from the non-Muslim perspective.
Matthew 10:34Think not that I am come to send peace on earth: I came not to send peace, but a sword.