Well I expect that if BoJo refused to aplogise for any islamophobia which happened and insisted that it had never happened, they would say that. It's not comparable because any other party from the Greens to Cornish Nationalists would deal with racism if and when it occurred in that party.
A lot of labour people want Corbyn to do that and labour mp's have resigned over it, but he won't !

That's the problem