Were the MAGA hat teens at the Lincoln Memorial victims of the Trump effect?

Remember the "red hat" kids?

Remember the video-recorded face-off between students from Kentucky's all-male Covington Catholic High School, some of whom were wearing bright red "Make America Great Again" hats, and a drum-beating Native American activist at the Lincoln Memorial in Washington?

Remember how the incident, at the beginning of Martin Luther King Day weekend, provoked a national combination of outrage and confused head-scratching across the Twittersphere, including the account of @realDonaldTrump?

Well, never mind. A report released