That article is more outrage porn than anything else.

That doesn't sound like a denial that it's actually happening.

If you can’t see the difference between deporting someone and stopping them to see if they are the person to be deported what can I tell you.

If you are traffic stopped by a law enforcement officer for any reason you are “detained”. So in that sense US citizens are detained all the time. Nothing new here about that. They apparently detained him because someone missed a court appearance who has used his address. That might be a more aggressive application of investigation than the prior administration’s policy for handling people that miss their immigration court cases, but it’s not inappropriate for a LEO to show up at your door if you miss a court case in general regardless of your immigration status.

“Machado said he was uncuffed and immediately released after showing his driver’s license.”

Seems like they treated him appropriately as soon as they verified his identity.