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

If the objective is to scare people off from going to the USA, then they're doing a magnificent job. I've heard other cases of people with green cards being arrested and put in terrible conditions, with absolutely no reason given. This woman was ready to go back home and not enter the US, but instead she was dragged through hell and only released because she was Canadian. All those with different passports get subjected to their own more oppressive and never ending hells, like being deported to a prison camp in Ecuador with no idea when you'd ever be released.

New America is absolutely terrifying.

I wonder why agents in the field, customs, immigration etc, seem so eager to implement these changes.

Rhetorical question, or are you genuinely asking?

Genuinely. Are they all Trump fans that say "finally we can do what we always wanted to do" or what?

I mean there's the law or some executive order but there's also leeway in implementing. I am not qualified to judge but it just seems to be some sort of preemptive obedience.