for those that think religion doesn't advocate these things, i'll give you judeo-christian proof that it does. here is a bible passage that advocates murdering your child if it is disobedient.....
Deuteronomy 21 (American Standard Version)
18 If a man have a stubborn and rebellious son, that will not obey the voice of his father, or the voice of his mother, and, though they chasten him, will not hearken unto them;
19 then shall his father and his mother lay hold on him, and bring him out unto the elders of his city, and unto the gate of his place;
20 and they shall say unto the elders of his city, This our son is stubborn and rebellious, he will not obey our voice; he is a glutton, and a drunkard.
21 And all the men of his city shall stone him to death with stones: so shalt thou put away the evil from the midst of thee; and all Israel shall hear, and fear.
now, most religious people haven't read the bible and don't take their religion too seriously. it's more of a cultural thing for them and they believe in a god, just in case. then there are people who take religion seriously and the scripture that the religion is based on and they think and do awful things because they believe that it is the way they should live because if their texts are sacred, then 100% of their texts are sacred.