I think sending a child into an enviroment where they would receive hostile treatment from other children is crazy.
If you live in an integrated neighborhood that's fine and dandy, but if you don't there's a reason. You live in Philly. There was a cross burned on a black family's frontyard a few years ago. There are plenty of schools in Philly where there are a good mix and friendliness, Central , Girls High etc and shit my first day at Central we had a race sensitivity assembly.