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Its main mode of operation is fish-net-style catching brown people on the streets and making them sign voluntary deportation. That allows to bypass any court orders and any requirements of the law (like hearing, lawyer, etc).
Edit: to the commenter below:
>I care because my children are approaching the workforce and I want their opportunities to open up to them
do you really want your children to work in strawberry fields in CA in 100+ degrees weather? That is the opportunities which mostly get open when you remove the migrants, legal or illegal, that ICE is targeting.