Thirty years after the War of the Waleses between the then-Prince Charles and Diana, Princess of Wales, Prince William and Kate, Princess of Wales, are having “fiery rows” about Prince George’s schooling. The future queen was “horribly bullied at her first boarding school and can’t bear the thought of George suffering through that,” an insider spilled. There is rampant speculation that George will attend the renowned Eton College near Windsor Castle. But “Kate thinks sending George to such a stuffy, upper-crust institution goes against all of their efforts to modernize the monarchy,” the sourc…