What is ICE doing that is bad with regards to using facial recognition technology. If a person is block from immigration because of past history why not have to

What is ICE doing that is bad with regards to using facial recognition technology. If a person is block from immigration because of past history why not have tools to make it easier to turn them down. It certainly does have the issue of the Holocaust. why not have vendors we know we can take to the task of due diligence? Our bordering countries have more stringent immigration policies but we don't see the gnashing of teeth when we try to move towards similar strategies. With regards to the child separation issue that was even being done by the prior administration but never received as much headlines. At end of April there were 10k children separated but held in protective care, in 2013 it was 25k. We have this influx because the wrong message is communicated into foreign countries. This means all the dangers of passing through Mexico which doesn't want them either and don't even think of going to Canada