Johor Crown Prince Tunku Ismail Sultan Ibrahim should stop commenting on matters beyond his knowledge, said Dr Mahathir Mohamad.<br /><br />Though he refrained from criticising Johor ruler Sultan Ibrahim Sultan Iskandar, the prime minister, however, did not mince words when it came to the heir to the throne.<br /><br />"I don't want to comment on the sultan because if I say anything that is not good, it's not nice because he's the sultan.<br /><br />"But this TMJ (Tunku Ismail) is a little boy… He is stupid because he doesn't know what is happening.<br /><br />"So don't talk. When you don’t know anything, don’t talk," he told a special media interview in Putrajaya this afternoon.<br /><br />Mahathir was asked to comment on Tunku Ismail's statement that his father's good deeds, such as giving lands to the people and government, were not highlighted.
