They succeeded...IIRC the school only stayed open (in Cambridge at least) for less than a year.
If you have some spare time google "Commonwealth Day School"...lots of juicy stuff,a lot of it courtesy of the Harvard Crimson.
I don't mean to sound all SJW, but this is a disgusting story. A bunch of while liberal elitists basically shutting down a private elementary school where appx 90% of the student body was minority, because they didn't want "increased traffic" (uh huh..). There is a special place in hell for scum like this.