Here is Jeff Sessions' "zero-tolerance policy".
https://www.justice.gov/opa/pr/attorney-general-announces-ze...
This policy has been one source of the controversial separation of family members from one another. Whether you supported previous admin policy or not is not really relevant, this is easily the most widely discussed component of the existing controversy.
This is one way in which the current administration has departed from previous ones, in a concrete policy based manner, and there are others. You can find all of this information online quite easily, and I would encourage you to do so.
edit: I'm going to disengage, but for anyone saying "What about Obama?" did you watch the last Democratic primary debate? Biden was asked directly if he would apologize for the policies of that administration.
do i get extra argument points for not liking ICE no matter who's sitting in the white house?
So the answer is no, I wasn't because I was unable to be outraged due to my lack of information.