No, he is the figurehead for an organization several thousand people strong
That organization sent 19 men to America and killed about 3,000 people. They killed hundreds more, mostly innocent Africans, at our embassies, dozens at the Saudi barracks, and another dozen or so on the USS Cole. They were and are behind other attacks that are killing people just about every day. They declared war on us. What were we supposed to do, continue to ignore them (see the Clinton years), or decide to take them seriously?
As for bin Laden being Saudi, that's true, and so were 16 of the 19 hijackers. It's a real problem with no easy solution.