So if all of this stuff is "modern morality", who gets to define morality, and who gets to enforce it? Do you really want the government have the power to tell you what is right, what is wrong, and what you must believe? Several posters on this thread have talked about morality, "western values", and generally a feeling of "if you don't like it here, leave".
I'm not British, but I'm sure many of the Muslim parents in the UK were born there. They are as British as any of you. They have as many rights as any of you.
I'm actually hearing quite a lot of (perhaps unconscious) prejudice against Muslims. And yet many of you are denouncing what you consider to be prejudice against LBQT etc.
Whatever side you look at, there is some prejudice. The point is, that this issue in itself can not be settled. None of the major religions in the world, that I know of, can fully accept the LBQT message, because that message is not based on morality at all. I'm not talking about someone's gay son who is probably a decent young man, but the ideology behind all the political and social pressure. If you look at the some of the stuff coming out of the US in particular, there are some very peculiar messages being pushed onto kids these days.
The next issue, if you haven't already had it, will be bathrooms in schools, and whether they should all be unisex or whatever (And wouldn't that be fun for a girl getting her periods for the first time?)
Bullying is always wrong, but it is possible to disagree strongly with someone, and not bully them for it. What schools should be teaching is not that "everyone is right", but that "everyone deserves respect, whether you agree with them or not." Children should be taught how to disagree, respectfully.
I was raised in a home some of the posters here would denounce as "fundamentalist". I went to government schools. I didn't go around abusing my school mates for being gay, any more than I laughed at them for believing in Father Christmas. I am now raising my 6 year old son, again in just such a home. I home school him. And yes, I teach him about "social construction". I teach him that colour is gendered - and that if he likes purple better than blue, then good for him. Toys are not gendered, and if he likes dolls as well as cars, then no problem. But because he likes purple, fairies and mermaids, there are people out there who would tell me he is gay or trans, or queer, or just confused. Nope, he's a healthy normal boy who just likes what he likes.
A child of 6, or even 8, does not need to be confused with all of this stuff. As some PP said, teach them kindness and respect. They don't need all the rest at this point. If my son went to this school, I'd be pulling him out too.
To say Muslim parents cannot teach their children what they believe is right and wrong deprives them of their human rights. What they may not do is teach their children to take away the rights of others. But that applies just as much to any other family, from any other background.