I find it surprising that the Headmaster is insistent that "most members of staff where wearing similar headgear", but that it is those (presumably) same staff who are calling for him to be sacked. Someone is lying here.
No, he wasn't being racist -- but perhaps a bit silly. Made a mistake I think with the caption to his photo, too. "Gone native" by wearing the turban.
I think it's ill advised and pretty stupid but I don't think it's racist. He does however need to learn something very basic- if you do something stupid it will eventually come back and bite you on the backside, I think that is one of the first rules of leadership, so be more careful and sensitive to other people's sensibilities if you are a headmaster.
AOG - the head teacher will not be a member of the same union as the teaching staff in the school. they will probably be NUT members, he will probably be a member of the NASUWT - so it is appropriate that the NUT represent their members' grievences, and the NASUWT defends their member against them. THAT is unions for you.
AOG - with regard to your original question - was this headmaster racist?
I would say no, but he should certainly hold up his hands to the twin arguments that he was foolish in behaving in this way, and lacked judgement in placing it on a social media site.
youngmafbog - "No he is not racist and the Union shold butt out."
The Union only become involved if their are approached by one of their members. You need to butt in before you can butt out - so that's a bit tricky for any Union, wouldn't you agree?