People have no idea what to do. What do you do? Raise funds for his defense? Write congress? Pretty much none of that will have any effect. Shut down a border crossing, Mexico will cave in seconds. Impact NAFTA, the administration will cave in seconds. Boycotting Mexican products? Pretty ineffective, and allows the narrative to be dictated by the media - these are people who hate Mexicans, racists. Shut down the border crossing? All it does is cut off money from Mexico, far more than they will skim from bribes.
Something needs to be done, and you are right in what you said.