I think the answer to this should be pretty clear. In most of the so-called western world, being white and Christian (and male, of course) put one at the top of the social order, and this had been the case for a very long time. Even in the 1950's and 60's, there were hardly any members of governments who were not white, Christian and male. In the 1970's this began to change, as did the demographics out there in streets, where immigrants who were not white and who were not Christian began growing in numbers. And as they wanted a "piece of the action," and wanted to be considered "as good as the next guy," they started agitating for their own place in the power structures, until such terrible anomalies as a black man being elected US President, or worse, a partionally black woman as Veep. Congress and state governments are filled with non-white, non-male legislatures, and the courts have black women sitting in judgement over white men -- oh the horror!I think what we're seeing today is the result of identity politics ostensibly taking a very wrong turn somewhere around the late 1980s and 1990s. I'm not sure how or why, but that's when I started to notice a change in direction and different kinds of rhetoric which were incongruent with the narratives which were formulated in the 1960s and 70s. What was once a message of love, peace, and togetherness turned into something else which is hard to define, except that it's more divided.
I think that's what is happening, especially in the US. Those white men want their rightful place at the top back, and are now arming and readying themselves to take it.
Edited to add: Oh, sorry, I forget to add heterosexual to white, male and Christian.