Collin Powell Lied and People Died

Colin Powell lost all credibility in the days leading up to the Iraq war. He lied, through his teeth, to the UN, to the world, about Iraq's WMD. I'd love to know the backstory, it seems he was pressured, but it doesnt change the fact he lied, and his lies helped mislead us into war.
He is not an honarable man and Im personally done with him. What he did simply unforgiveable.