I like your Christ. 
I do not like your Christians. 
They are so unlike your Christ.
Gandhi

At the risk of seeming to be speaking for the late Mr. Gandhi, I see this sticker as pointing to how Christianity as it is widely practiced today differs from the teachings of Christ. In America especially, there seems to be a view among Christians that war is easily  justifiable, especially when waged against a non-Christian people, or a non-Christian government. 

Many people think of America as a "Christian nation." Though this belief is highly debatable, one result of this belief seems to be that Christians feel they must support the U.S. government, especially when it is being lead by a Christian president.

There is also a strong materialistic streak to American Christianity, which seems to be based on the notion that if God has blessed you, the evidence will be the size of your house, or the price of your car. 

Of course, neither of these ideas is supported by the teachings of Christ.   

Dan R. Frazier