"For this is the message that ye heard from the beginning, that we should love one another." [I John 3:11]
Christ taught many things while on this earth. He taught about the Kingdom of Heaven, about salvation, about sin and compassion...but one thing He hit on more than once was love. This message continued in His apostles' writings as they took the Gospel out to the world and rebuked and encouraged congregations of the church in their letters.
We are told to speak the truth in love [Eph 4:15] as we preach the gospel of Christ to the world. What good would it do Christ or the church to take a message of hate and hot temper into the world? Nobody will respond to that, especially not in today's world.
It pains me to see "Christians" doing just that. Back in July of 2010 there were news stories about a congregation in Gainesville, Florida under the leadership of Terry Jones that was going to burn Qurans on September 11th, 2010 in protest of Islam. We are certainly to fight false doctrines and false religions such as Islam, but the Word tells us to do so with an attitude of Love. There's an expression that you hear a lot that says to "hate the sin but love the sinner", and that's exactly what we're supposed to do. After all, isn't that the reception we get from God who hates all sin, yet loved us enough to sacrifice His only son for our salvation?