I know you're not arguing with me here, but you're ignoring one factor. Yes, placing kids in cages and those conditions is absolutely ridiculous. Fuck the Obama team for doing it, but fuck Trump's team for doubling down on it.
The major difference was in 2014 those kids were unaccompanied at the border. They were held in facilities while the parents were being located. Estimates are 80% of those kids were able to be reunited.
Trump's policy is to remove the children from their parents at the border.
Both policies are shit, but one is simply evil.