It's always the GOP .... The Tea Party.... A Trump rally...
Never at a Hillary Rally......Certainly never at a Sanders Rally
Never at a democratic rally...ever.
Why?
Because, unlike republicans, democrats express their patriotism and love for country through actions, not just words.
Actions such as defending a woman's right to privacy, gay Americans' right to equal protection of the law, and the right of all Americans to vote.
Republicans and conservatives engaged in a USA chant is meaningless when both seek to violate the fundamental rights of their fellow Americans, and when both exhibit fear and contempt for diversity, dissent, and expressions of individual liberty.
That's why.