Commentary: By Salom&oacute;n Baldenegro &nbsp;&nbsp; In Tea Party Republican Arizona, teaching Mexican American history is illegal because that history is purportedly &ldquo;un-American&rdquo; and foments the &ldquo;overthrow of the government.&rdquo; &nbsp;&nbsp; The shamelessness of people who rally under the Confederate flag&mdash;a flag of treason, whose adherents renounced their U.S. citizenship, declared war on our country, and [...]