Why did Christians kill in the name of theirs? Why was it public practice to stone a woman/man for adultery? I mean did you ever even read the book aka the Bible? 

Every god has been a vengeful god and there will always be people who want to exploit the crazy and fanatical ends of the book rather than the love, redemption or forgiveness aspects. 

Ppl tend to take what they want from any religion like it's a buffet table.