I'm not sure how seriously I should take someone who is obviously perfectly happy with teachers engaging in anti-Christian practices, seems to not understand why parents like me choose private faith schooling, and is even "entertained" rather than seriously provoked to consider questions of ultimate meaning by my calling out of Eastern religion as contrary to Christianity [it is- and whoever taught you that they were compatible is better suited to entertaining than doing work on theology.] "Anti-Christian" does not mean "wanting to do physical harm to Christians"- I'll gladly give you Buddhists are peaceful. It means "in opposition to the tenets of Christianity." Which do NOT include pan(en)theistic spiritualities based on oneness, mystic global interconnectedness and denial of Jesus Christ as God in the flesh.
There are things in life where two sets of concerns must be very carefully balanced- but here, the concern of people of faith that they not hand over their children for dozens of hours a week in their formative years to an establishment which specifically contradicts their very worldview outweighs community-cohesion concerns so much that the scales break.
I am unapologetically for proper pluralism and multi-culturalism, a salad bowl NOT a melting pot, distinctive faith communities NOT an "interfaith" community. A country where discrimination at work and in public service is illegal, the state keeps order and moderates within faith communities deal with their extremists before violence is perpetrated- but people are not judged by haughty outsiders for a degree of separatism in their personal, family and social life. For example the ultra-orthodox Jews who mostly keep to themselves in one part of London are just as good citizens in my eyes as the cosmopolitan Jews who may be seen a few boroughs away mingling with a broad mix of people, holding hazy theological convictions if any, and live-and-let-live moral "standards". The right to mix socially with one's neighbors is not some sort of binding duty and separation without hatred or supremacism is not an evil in itself.
Where people treat each other respectfully as human beings without subsuming their worldview or relativizing their tradition, where calls to adopt a mushy post-modern line about "my truth" being relative and different to "your truth" are thoroughly drowned out by proud people of whatever faith encouraging honest discussion,which may or may not lead to proselytising. People like me and my Muslim and Hindu friends who object to the same tactics in state schools, seek the same solution, but ardently disagree with my theology- so it should be. We follow our books, the Book in my case, alas false religious books in theirs. We are agreed in the reality of God, the resistance to fluffy "all the different world faiths are celebrations of love'n'peace" trash, the rejection of San Francisco values.
I am especially offended by atheist "ultra-inclusivist" interpretation of a Truth they have rejected! Such people (ex. pointythings) forever focus on the inclusive aspects of the life of Jesus when dealing with Christians, utterly ignoring the EXclusive elements of faith. These people think it fair to put everyone in together on THEIR lowest-common-denominator terms. No thanks. Not my children. We are called to be separate philosophically from the world, while showing goodwill to all men, as Jesus did. He showed love to the outcast, the poor, the sinners and the tax collectors- but had He married and became a father, He would not have sent an innocent, spiritually and intellectually maturing child off every day to be taught by those who reject or compromise His message.
So long as people in a society hold different beliefs there is the possibility of conflict. That risk is a necessary consequence of freedom of religion; how we manage it is a complex question, but "cooking off" fundamental difference in a state-funded secular humanist melting pot is not even approaching a reasonable solution.
Sorry for long post but I felt the ideology which privileges "community cohesion" above practice of faith and values transference needed a properly thought out response, so you could see where I stand.