Here is what the alt-right got out of the event. We have two completely different narratives going on.
Go to 6:40 in the video, and listen to the Black Israelite preacher say verbatim.
Here is another clip (3:55) where the Black Israelite preacher says:
At 1:35 in the attached video, an indigenous protester can be clearly heard saying:
https://www.youtube.com/watch?v=Si4EUuW-GjQ
So this is what the alt-right is talking about and they are characterizing the kids as the victims and the other side as racists and homophobes based on the clips above.
Do I think the alt-right really cares about gay rights? No. Does the alt-right care about hatred against whites? Ah hell yes. The bottom line is that the alt-right is using this event to shape a narrative.
By the mainstream media ignoring these things that were said by leftist protesters, they are re-enforcing the idea that the media is attempting to shape its own narrative and that they are fake news.