I know you're just itchin' to change this thread into your multitude of unrelated videos because you can't handle the one in the OP but they're still irrelevant.
Why was the flag dropped?
And who walked away with it?
Exactly.
They dropped the flag because they wanted to desecrate it.
Some nice Marines picked it up off the ground and tried to give it back, but they sped off and didn't come back.
Keep up the phoney outrage, since clearly other cases of protester intimidation and assault don't concern you.