I agree that the 2016 election certainly had a role in exacerbating it due to Trump getting elected. However, according to social psychologist/professor Jonathan Haidt, far leftism/SJW culture started in 2014 and began slowly manifesting since the eighties and nineties as he explains here:
I mentioned Australia because its new PM and government wants to cut down on immigration and it isn't as diverse as Canada and it takes in much less immigrants compared to Canada. However, its PM and government could change in the following elections and allow more immigrants. I will also concede that Australia is already multi-ethnic/multicultural. Asian and African countries are mostly mono-ethnic/monocultural except for a few of them.
US/Canada/Aus/NZ do that, but Europe takes in tons of unskilled economic migrants.
Here you are, in regards to immigrants draining the welfare system in Europe as I only mentioned welfare in Europe and not crime:
Source: https://acdemocracy.org/muslim-immig...cial-benefits/An estimated 40% of Muslim youth in France and 50% in Germany are unemployed but far from destitute. Rather, they receive a wide range of social benefits. For example, an estimated 40% of welfare outlays in Denmark go to the 5% of the population that is Muslim. According to Otto Schily, former German interior minister, speaking of immigrants in general: “Seventy percent of the newcomers [since 2002] land on welfare the day of their arrival.” In Sweden, perhaps the most acute case, immigrants are estimated at 1.5 million out of 10 million people; immigration is estimated to cost almost $14 billion per year.
These high levels of welfare are accompanied by high levels of unemployment. Nor has this situation improved; rather, it is deteriorating. According to analyst Christopher Caldwell: “In the early 1970s, 2 million of the 3 million foreigners in Germany were in the labor force; by the turn of this century, 2 million of 7.5 million were.” Similar stories abound in other West European countries.