it's a good question. Of course there's a reason, and it's the same reason that Gays, Blacks, Asians, fat people, skinny people, old people, Travelers, Gypsies and currently Muslims are despised..it's ignorance, plain and simple. Hitler put to death German children who had learning difficulties. Anything that didn't fit in with his distorted view was made to look sinister. It appeals to the ignorant masses, looking for a reason why their miserable unfulfilled lives didn't live up to their expectations. You're not alone in your ignorance. But if none of that resonates with your personal bigotry and Racist views then try the "Jews killed Christ" one. That has always gone down a treat. Yes , we killed the son of G-d. dirty, filthy greedy Jews.
Suspect Bangkok bomber arrested, found with possible bomb-making materials (Reuters)
from the article: U.S. Defense Secretary: Iran could get nuclear bomb within a year