And it, of course, goes without saying that attacking an innocent muslim for the crimes of another muslim is tragically wrong as well.
Frist of all, he's not a Hindu, he's a Sikh. They are different things. But your right. Attacking an innocent Sikh, Hindu, Muslim, or anyone for what happened is wrong.
However, I'm a little troubled by the phrase "the sins of Islam." It's not Islam that atacked us, it's a few cowardly terrorist animals who are distorting the name of Islam.