I doubt those defending ICE's actions (including wearing masks) have ever lived in a country with an often unaccountable and secret (i.e., unidentified) police

I doubt those defending ICE's actions (including wearing masks) have ever lived in a country with an often unaccountable and secret (i.e., unidentified) police force, i.e., Stasi, SAVAK, Gestapo, KGB, DINA. If they have, they would understand just how fundamentally opposed to democratic societies organizations that operate like ICE are -- they're very much a sign of authoritarianism / totalitarianism. Their tactics are not "enforcing immigration law" -- we have non-secret and accountable police forces whose job is to enforce the law. ICE is more like the vigilante groups enforcing Jim Crow laws in the South back in the day.