Well then, if that was the case then Assange could just as well peacefully with the rest of the Ecuadorian delegation.

Don't forget that Assange is not and asylum "seeker" anymore, but that he has in fact been granted asylum. In other words, under international law, he is and Ecuadorian Citizen and unless Britain decides to transgress International Law and effectively declare war on Ecuador, no amount of sabre rattling will amount to anything at all.