Protests organized by liberals will be one and done events that will culminate, at most, in asking you to give money to the feckless and complicit Democratic Party. Their effect may be something that feels like community or catharsis, that you are not alone and can accomplish things together, but it's important to reflect on the fact that without organizing a longitudinal campaign that takes disruptive action, this is actually a false catharsis.
When you attend one of these events and seriously question what was accomplished and why there are no real next steps on offer, please consider looking to your local organizing groups, the socialists that have a program to plug into. US socialists are a small group and still learning how to have impact, but they punch above their weight because they focus on organizing and education against the structural forces responsible for oppression, consistently, and not just to use you or rich donors as a piggy bank, but to get the masses coordinated to take action.