This is really not a global trend. Inner City minority heavy suburbs like Cabramatta or Bankstown swining right is really not something we are seeing in most of the rest of the world
It's happened in Doug Ford's Ontario.
Its debatable. The Fords certainly did well in "Outer city minority heavy suburbs" (not inner)...but those were contests where their main opposition were Blue Grit/Red Tory establishment figures (i.e. Smitherman and Tory). In the provincial election it was a bit more complicated with the NDP winning the "inner city minority heavy" areas...its fair to say that when support for the old middle of the road Liberals collpases - some of that support goes left and some goes to the populist right...