Is Christianity to Blame?

It has become quite a popular position amongst the Alt-Right that fault for the loss of identity and in-group loyalty and even the self-sabotage of Western societies is the result (the inevitable result, as some would even have it) of Christianity. Some of those who hold this viewpoint even go so far as to attempt to resurrect or at least extract certain elements of the pre-Christian religions of Europe. However, I find this view to be mistaken and is based upon an historical horizon that stretches scarcely more than a single century into the past.