Well he managed to reinvent and make up all new facts in Bravheart and the Patriot. He is a known Brit-hater. Luckily he had facts to base the Passion on.
Ya know, Braveheart and The Patriot are not documentaries or anything - they are entertainment...
I'm really sorry that your fragile ego was crushed by some stupid movies loosely-based on historical events. It is a documented fact that atrocities occurred during the War for Independence (I had ancestors who fought on the side of the Brits) and no amount of whining, historical revisionism, or complaining will change that fact.
So, take a moment of reflection and realize that not every celebration of American or Scottish glory is a slight against the British, mmm kay? In other words - grow a pair.