As far as the most important group (by numbers?) is represented by the March, right?  Who represents all the gangbangers and others affected by street and random violence?  They outnumber the numbers of school kids shot or killed by a large margin.   Last I heard, hundreds of these unfortunates are gunned down every year in many larger urban areas, no one really seems to care about them.

The Parkland kids did a very good job of trying to include everyone. 

Did you watch the speeches?