It might be suspicious, but they don't get any incriminating evidence that way. It's also much easier for people visiting. Most of the time entry is denied and you can take the next plane back home. I'm fine with that, don't care. I only care if I would get taken into ICE detention. This risk grew significantly, so I simply won't go.

You make it sound so "meh, whatever", but there's a few realities attached to this:

The airline in question will likely not serve you again, but probably more importantly, when you apply for a tourist visa to just about any country on earth, you'll now have to answer that question "Have you ever been denied or refused a visa or entry into a country?" and while some might take sympathy on "Oh, yeah, we get it", you can be sure you'll be getting extra attention and some countries will threaten to deny entry too.