It's pretty close to 50/50 population wise. A little over half are right wing mostly in the sticks. A little under half are left-ish, mostly in the cities. But yes, basically anyone who couldn't hold down a job anywhere else was told to grab a shovel and head to Alberta to dig for oil. And they came, by the millions. They bought up the cheap houses in all the little whistle-stop towns and then headed off to work the rigs. We leaned a bit right before they came, but not this far right. Even most of the farmers find them extreme.
The American oil barons promoted American style culture and a disdain for Albertan history and cultures. Most of the rig pigs and truckers didn't know any better, they weren't from around here. Now 25-30% of the province doesn't even identify as Canadian.
Don't misread me, it was never a haven for critical thinkers, but we had one of the finest public education systems in North America for nearly 30 years once. You wouldn't know it now. Our public health system was a miracle for how low our population density was. It's still not as bad as some of the truly dystopian parts of the US, but it's certainly a struggle compared to some provinces. The racism and xenophobia always existed, but it was never this widespread, and it certainly wasn't this open. All our independent news orgs are now wholly owned by American hedge funds.
There's some bright spots though. The arts are still widely celebrated here. Calgary and Edmonton have more stage theatres than you'd find in many cities twice their size, and music festivals are everywhere. Arguably we have more diverse food culture here than most places in North America too. The urban centres are actually pretty cosmopolitan and friendly. If you stick to the urban metro-areas and the national and provincial parks, it's still beautiful.
And the political situation isn't as hopeless as some people make it out to be. We're outnumbered, but just barely.