what men don't realize

unrighteous humans probably prefer to abuse righteous humans 

but unrighteous humans will abuse unrighteous humans if they get the opportunity 

because of that unrighteous humans might dislike unrighteous humans 

if too many humans abuse other humans in a society 

then that society collapses 

and few humans would survive that 

all humans instinctively feel this 

that's a reason that unrighteous humans want other unrighteous humans to die