Such monumental arrogance! You are not qualified to decide for everyone else what is the "proper" response; or who is a proper Christian.
Of course, if you're merely a sociopathic megalomaniac, I can simply ignore you.
I dunno, a highly-respected Christian missiologist who has written extensively on evangelizing in the Muslim world and who is the president of one of the foremost evangelical seminaries in the US certainly seems qualified to offer what he thinks to be a more appropriate response to Islam than un-Christian fear, violence and hatred to me.
Hitler, Stalin and Mao were a sociopathic megalomaniacs do you think it would have been wise to ignor them?
As a general rule any sociopath is dangerous.