|Haka - All Black style|
Even if the Haka does not intimidate the receiving side or bind the dancing side closer (and if they did not think it did one or both of these would the All Blacks really continue with it?), it implies that one team has some superiority over the other which gives them the right to assert this pseudo traditional challenge at them.
This would allow the English team to respond to the All Black challenge with a suitably blood curdling Morris Dance. That would show them.