I’m not watching the game, but I’m fairly certain that this is a fan thing to try to distract the players, not a political statement. I’ve seen the kids around here bring head shots of politicians and everyone else under the sun to games before. Just a current trend.
I saw a glimpse, and what you describe was how it looked to me. If I'm not mistaken, a few of the "heads" were even upside-down--probably more from the effect of the waving around than from any deliberate message or disrespect.