We can go to court. there's a complicated system of whether or not it makes it to the Supreme Court (which is extremely unlikely), but there are also civil rights groups, petitions, special interest groups and you can join/start one of these to bring attention to the law you're protesting
The correct answer to this open question is the following.
What we can do today as American citizens to protest laws that we consider unjust is to exercise our right to protest, which is supported by the Constitution. We have to do it in the correct way, not in a violent way. We have the right to pacific assemble, to march, and organize demonstrations to show or opposition to injustice laws. And we also have the right to contact our Congressmen to express our unconformity and ask them a reasonable way to resolve things.
The Knights of Labor's 1885 strike against the Missouri Pacific Railroad was an overall success for the union because there was an increase in its Membership as it soared to 700,000 including 600,000 African Americans.
