The former Respect MP, who is attempting to outflank Mr Khan from the left, added: “If these are the kind of things he SAYS... imagine the kind of things he thinks”.
But a friend of Mr Khan told the Standard: “Nobody in their right mind would think Sadiq was saying that. He’s very proud of his dad and everything he did.”
Mr Galloway described the Sunday Times interview as the Labour candidate’s “Mandelson moment”, referring to Labour grandee Lord Mandelson who said he was “intensely relaxed” about people becoming “filthy rich”, although he rowed back on his remarks more than a decade later.
Mr Galloway added: “Are those mushy peas or is it guacamole?”
Social media weighed into the row with Londoner Punam Tiwari tweeting: “Some of my family members were bus drivers and they put me in higher education. This is an offensive comment” while R P McMurphy said: “Breaking News. Sadiq Khan throws HIMSELF under bus!”