I had heard this was an anti-ICE series but I didn't get that sense at all. It certainly delved into some controversial policies, but those aren't created by the ICE employees. For the most part, I see ICE agents doing their jobs and in a respectful and diligent manner. Any errant comment can be taken out of context.
As for the politicians, the series tries to show all sides, warts and all. Trump and his aides are certainly disingenuous in their about face on family separations. However, the "Abolish ICE" crowd comes off as unrealistic. Whatever the agency is called, there is still going to be a need to enforce immigration laws.