I have seen and heard many Muslims leaders and clerics making statements about other religions. Do they need to apologise as well?

Iran's president Mahmoud Ahmadinejad made a statement that the Holocaust was a "myth" and a factitious event. Should all the Jews request that he apologise?

My school teacher once said that I am a kafir (non-believer) and that I am an idol worshipper. Should I demand an apology?