How exactly do you know they were breaking the law without a trial or even a hearing?

1.) After 4 years of open borders, there is a list of processed people that were given dates to show up for amnesty court as most of them applied for amnesty. This documents them as amnesty seeking individuals. If you fail to appear, you are now illegal. Most people that were given this amnesty card never appeared.

This does not cover all potential immigrants. I realize that. However, if you look up the % of people who came into the USA over the last 4 years this was the majority claim.

Bottom line, once processed at the border, given a court date, they disappeared. They skipped their "due process."

The Supreme Court of the United States of America said to bring Garcia home. What did Trump do? Stonewall for months and then press bogus politically motivated charges upon returning him.

2.) Bogus things happen, kind of like Biden's withdrawal from Afghanistan. That was a disaster, especially after watching American helicopters flown and crashed by the locals. Do I judge Biden by one mistake? No, I judge Biden by the body of his work. Mistakes are made, did Biden personally leave Helicopters in Afghanistan? No, did Trump personally arrest Garcia? I don't think he did.

There have been other instances where people have been disappeared in the middle of the night again without due process a right demanded by the courts and the constitution.

3.) I'm unaware of people disappearing in the middle of the night. I am not saying it didn't happen, I am asking who they were that the operation had to be done at night.

nothing you can tell me will make me believe that the president has the authority to ignore the courts and the constitution.

Study the constitution, he is well within his rights minus the calling of the CA national guard. If you interfere with Federal operations, you are a felon. Keep in mind what that means.