You actually think that rejecting your notion that the U.S. is no longer wonderful is the same as sticking one's head in the sand?
Get some priorities and take off your cloud-colored glasses. They are as DANGEROUS and deceptive as rose-colored glasses.
Like the sheep you criticize, you ALSO are a sheep of a different kind, wearing blinders of a different kind. You bury your OWN head in the sand; you pretend nothing can be done, as opposed to those you accuse of thinking nothing needs to be done. You are, in essence, the same kind of critter.
Its better to stay impartial and act when its prudent. I believe that the right opportunity will come along and it is at that time my actions will have significant influence. Its much better than flailing around and trying to swat at everything.