Nazis did this in 1930s Germany as well, but I'm fearmongoring when I bring this up.
You folks arguing about masks are missing the bigger issue. No uniform, no identifying markings of any kind, no badges. Wearing a mask is the least of the problems here. Like one of the witnesses stated, they didn't know it was an arrest or a hate crime.
I might be able to come to terms with wearing a mask and no name tag, but they should all be in uniforms with a badge on the front and very clearly visible ICE markings on the side and back. There should be no doubt in any witness's mind that they are law enforcement. They should never pull up in unmarked vans, jump out, force someone into that van, and drive off like we saw in the video of that college student earlier in the year. That should never be the MO of law enforcement in this country.
Their actions resemble what we see in the movies from underground criminal organizations, not respectable law enforcement doing their civil duty.