People voted for segregation and ICE deportations. The point of protest theater like sit-ins and ICE protests is to make people confront what they voted for instead of being blissfully unaware of the harms. We live in a democracy, so the most effective way to reverse something that people voted for is by education, and voters will not seek out that education themselves.
Often, it is the people who don't understand protest who understand the least about government. Many have the idea that if a democratically elected government does something they don't like, violently overthrowing the government will solve the problem. If the next government is a democracy, the same people will vote for the same policies.