I think a 4x2 is a London or Cockney slang word for a Jew.
I don't know where ellal is based, but if he's not London or East End based, it's probably unlikely that he'll be aware of the racist connotations of the slang meaning.
As you are from Essex, East of London, it's very probable that you are aware of the Cockney slang.
So accusing someone of intending to be racist, when only you are aware of the racist connotations, is like accusing a parrot of barking like a dog, they would have no understanding of the barking, nor the accusation.