“Targeting Trump” isn’t the goal, “no kings” is the goal. More specifically, the goal is to prevent one person from having unrestrained power over the country. Is a protest going to prevent that? No, not directly. Protests will let the people in power know that millions of people see what they’re doing and we all disapprove, and it will let other regular people and like minded politicians know that they’re not alone in their concerns, will will give more people confidence to resist when their might otherwise not.