The school wasn't demanding that the child or parents to go against the norms/moral codes of their religion, it was saying if you accepted a place for your son then you would have to accept our norms/codes. Point is they had a choice.

The airport... this is a legal matter set up for the safety of all... my suggestion would be to prevent Sikhs from breaking their codes that they raise funds to have an x-ray room and staff in the airport in order to satisfy legal checks and follow their codes (am I unrealistic? If yes then so are the Sikhs to think that the law should be bent to prevent them from breaking their codes).
Agree- Other faiths are always pushing the boundary, In UK troops didn't wear their uniform in public cos of threat of IRA- they've started to again and some muslims it's a sign of 'disrespect to their faith..instead of telling them to f off we sit round a table and debate it! ergo: they score another point!