If Catholicism upsets you that much, why are you trying to get ickle into a Catholic school? Surely you don't want to expose your child to such hypocrisy every day. As for the rite of Communion, if you are entitled to receive communion under any faith, then a priest cannot stop you (most wouldn't even try if you go down to the altar, but why are you after communion anyway)? Surely it doesn't mean anything to you.
*pre-emptive celebratory nipple tassle jiggle* - Sean Ewington