The same can be said about mosques and islamic centers in Brooklyn and New Jersey.
You are living in denial, which is very sad.
And just because the butchers were living in close proximity with others, it doesn't mean the others were in on it, let far alone the entire community. Did you blame white people for harboring Richard Speck, Ted Bundy, John Wayne Gacey or Arthur Shawcross? Were New York Jews to blame for David Berkowitz? (I'll bet you did blame the homos for Andrew Cunanan, however.)