Why smone that says go kill yrselves and cancer to your families isnt insta chat banned 10 games?
Because IFS is a robot. It does not make it's own determinations. It follows the script. If some one creates a "new" insult, it takes time for the robot to learn.
Does he not deserve it?
Eh. Personally, words don't bother me. Chat bans may be deserved. I wouldn't go to banning from the game entirely.
or why does he deserve second chance?
No one is perfect. If we never give anybody the opportunity to change, then they surely won't.