Dial down the outrage, kids. The pastor is quoting Luke 17:2 as it applies here.
Luke 17:2 Luke 17:2:
It would be better for them to be thrown into the sea with a millstone tied around their neck than to cause one of these little ones to stumble.
In other words, you're better off drowning yourself than you are inculcating sin and destruction to children because there's a very special corner of Hell that's reserved for those who lead children astray.
At least he's not suggesting to hang homosexuals from two trucks as is popular with Obama's friends in Iran and much of the rest of the Middle East.