protesting in San Antonio about Mexican President

Here in San Antonio there was protesting happening downtown a large group of Mexican Americans were protesting in Cuba keep your hands off in Mexico. Apparently they're creating chaos and havoc in the Streets of San Antonio because of something that the Mexican president is doing in their country. Would somebody like to explain to me how destroying the city of San Antonio will help anything that is happening in Mexico? We don't have any control of what the president of Mexico is doing there's nothing we can do about it. United Nations is trying to regulate and control what is happening there they're the ones that control that.

So what are the expectations of the protesters what is the plan what do they hope to accomplish I'm confused