Rank hypocrisy.

People are rightfully terrified of the BNP ever gaining any measure of power. A BNP regime would be authoritarian, restrictive and prejudicial.
How can it be then that Boris Johnson wants BNP London Assembly member Richard Barnbrook to "disinvite" BNP leader Nick Griffin to a Buckingham Palace garden party?
The BNP are scum. But let them attend the party to which they have a right to attend and ignore them.
Acting against the BNP in such a way gives them the oxygen of publicity and makes you a bit of a hypocrite.
Of course I don't want the Queen photographed with Nick Griffin. But if you think the Palace would actually let that happen, you're a moron.