'Allegedly anti-Semitic'?

This BBC report on Jeremy Corbyn's supportive comment about the mural http://www.bbc.co.uk/news/uk-43535710 contains this line:

'The comments came after Mr Corbyn was criticised for sending an apparently supportive message to the creator of an allegedly anti-Semitic mural in 2012.'

Allegedly anti-Semitic!  Does anyone see how that mural could be anything but  anti-Semitic? The BBC that's who,  for whom acceptable anti-Zionism is but a short journey to accepting anti-Semitism.