I'm the Canadian who was detained by ICE for two weeks

This is horrible and scary, why border guards are even giving the authority to revoke visas is beyond me. When people think about giving cops/guards authority like this they need to be picturing the dumbest bully from their grade school. That's who is going to be using the power

I'm about to travel to canada on work and as i understand it the last step in the visa is an interview at the port of entry where the border guard can decide if I get to stay or not.

When I went through it years ago, it was mostly about making sure you had all your paperwork in order - had the company sponsoring you provided the relevant information regarding the role and why you were needed, did your resume and experience match at all with the work being performed, etc. Basically I showed up with a list of documents and a very nice border guard looked it over and said welcome to Canada. Each time I traveled up there for work, the border guards were polite and professional. Each time I traveled home, I got pulled aside for advanced screening like I was a drug mule. Just loved all the America trivia questions and deep dives into the history of where I live, just so they could feel good about their jobs.

> Each time I traveled up there for work, the border guards were polite and professional. Each time I traveled home, I got pulled aside […]

Interesting, it was the opposite for me, US citizen with CA work permit circa 2016. CBP seemed to not care while CBSA was often irrationally aggressive and suspicious. The closest thing I got to an explanation once after being freed was “We just like you” with a grin.

My experiences with CBSA were pretty bad too.

I was grilled in Vancouver about whether the purpose of my visit was work or pleasure, after I helpfully told the officer that my dad was attending a work conference and I was traveling with him but sightseeing.

"Well which one is it, work or pleasure?!"

I don't know, dude. I just explained the situation: you're supposed to be the expert!