Of course it was a minority Jim, but it was still a serious issue for the party.
not according to me, but according to the entire NEC, numerous senior Labour figures and the Chakrabarti report.
Your denials were proved false.

Some time ago, it was recognised that there was a problem of Islamophobia in the Tory Party and demands were made for an enquiry

No, you just made that up.
There were claims that the London mayoral campaign used Khan's religion against him, but that was strongly disputed.