Didn't the Ninth Circuit federal court order ICE to follow this practice? See the Flores Consent Decree.
> The family is the natural and fundamental group unit of society and is entitled to protection by society and the State.
and:
"children and their parents must be housed together when incarcerated"
That clause (perhaps the entire UN declaration of human rights) seems incredibly ambiguous. Reading the whole declaration seems like it, perhaps, means protection of the specific enumerated rights of part 16 sections 1/2 which seems basically like the right for anyone to marry or not anyone they want and for that person to terminate the marriage when they choose.
There is also the issue of why they are incarcerated in the first place. They have committed no crime, migration and seeking refuge is protected under international law.
The UN universal declaration of human rights is written to be easily accessible and understood by the general public. And given that it was written 75 years ago I think they did a good job. I actually recommend everyone to read it entirely in your native language, as it has probably been translated into it and will only take a few minutes. A beautiful document indeed.
The important thing here though is not how rigorously defined these rights are, but the spirit of the law is clearly saying that the family is a fundamental unit of society. Separating the family unit is a failure to uphold that principal.
I must admit it sounds like the stuff of paranoid fantasy.
Update: this from Channel 4 seems reasonably calm and balance. I had to hunt through a lot of clickbaity headlines to find it: https://www.channel4.com/news/factcheck/factcheck-were-mass-...
For a country with a documented history of disrespect for bodily autonomy it seems entirely in line with expected behaviour to me.