I hope to see more American flags waved along with the flags of Mexico, Guatemala, and the like at future rallies in support of immigrants from Latin America.
Optics matter, and waving only flags of countries of origin provides fodder for so-called "patriots" to claim that these people are part of an "invasion" of the United States.
Actual evidence (what a concept!) shows that undocumented immigrants are an irreplaceable part of our economy and that they commit crimes at lower rates than citizens. However, they are used as caricatured scapegoats by an aspiring dictator — a group upon which to place the blame of all of society's ills. Those of us who paid attention in history class know that this strategy is an absolute necessity for a demagogue.