Americans don’t have constitutional rights. It’s a fantasy that has crumpled the second it hit the reality of having a dictator as president and a political party that doesn’t care about laws. The Republicans have deported American citizens (children) who were born in America. The Republicans have arrested a judge in Milwaukee because they didn’t like that judge following the law.
This wouldn't be the first time that it took a while for the courts to redress wrongs. Dred Scott technically stood until rendered obsolete by the Thirteenth Amendment. Brown v. Board didn't happen until the fifties. The courts didn't catch up to applying the Alien Enemies Act to japanese during WWII until after the war had ended.
This doesn't mean that we don't have constitutional rights. The whole point of an inalienable right is that it's an inherent right recognized by governance. The state can't take them away, only violate them.
As for your other points, I think you're actually keying on the wrong one; the administration's actions with Garcia are much more clearly wrong. The Wisconsin Supreme Court today temporarily suspended Judge Dugan despite the fact that four of its seven justices generally lean liberal, and are elected rather than appointed. We'll see if there's anything to the charges. If not, maybe we'll see each other at a protest, but it doesn't appear she was "following the law". As for the children, I believe that was due to a policy of keeping families together; if their parents must leave the country, they must follow or be placed in foster care.
Dismissing rule-of-law as a concept is both premature and counterproductive, in the sense that it only discourages people who could otherwise focus on using the checks and balances in place for this reason to rein in the administration.
