Sadism and pyromania are not genetic
You are trying to set a criteria on the value of a life. You make the assumption that by wiping out certain genes, things will be better. How can you decide what is better for another? Good, Bad, Better, all relative. Are there good genes you'd be wiping out with the bad? What of that potential? Most people understand one can not decide for another on these things.... WHY would one's view of these things trump anothers?