http://www.pewforum.org/2016/07/13/evangelicals-rally-to-trump-religious-nones-back-clinton/
So if you think that Trump's support among Christians is because "people are choosing patriotism over Christianity or over rationalizing the message of Jesus to include barbarism," then you have to figure out how the non-religious aren't doing that. Then you have to ask yourself if Christianity really is the force for good you think it is, instead of what I think it is, which is a mixed bag that we too often have to drag, kicking and screaming, to modern moral conclusions.
When the United States goes to war, do you think they care if you believe or not? There is not one candidate saying they will do their best to stop military spending and start addressing the problems at home. Supporting Clinton doesn't make anyone more moral than the other side when it comes to war and murder.