Iran hosted a Holocaust drawing exhibit over the weekend, aimed at diminishing and sometimes denying altogether the historical existence of the Shoah.

Israeli Prime Minister Benjamin Netanyahu took aim at the event, which happens annually in the Islamic republic, saying Monday:

“Over the weekend Iran convened a special Holocaust-denial cartoon contest. I raise this here because it must be understood what Israel’s problem with Iran is. Iran denies and belittles the Holocaust while it prepares for another Holocaust. I think that every country in the world must stand up and fully condemn this display of hatred.”

See more disturbing images from the “contest” below.