This question all depends on your point of view. If you have a religion like Christianity, Judaism or Islam then you believe in one Divine Being and believe that he is invincible, therefore he cannot be killed. If you have a religion like Hinduism or Jainism then you believe in many gods but again, being gods, they are invincible and immortal and cannot be killed. If you are atheist or Buddhist then you believe in no god and therefore a god cannot be killed if he/she does not exist. Long story short, you cannot kill God so nothing would happen because it is physically impossible. In some religions gods have killed gods but mortals cannot kill gods so nothing would happen if you killed god because it wouldn't happen.
Mankind would cease to be, then.
Then, everyone would die and perish. Mankind would cease to exist.
It means you must have been subconsciously thinking about such topics. I would like to add that being killed is definitely not the worst thing that can happen to you.
They would be killed by other means
They would be KILLED
Nothing would happen he can't die!
you are going to be killed too...
Yes. Cronus killed his father Ouranos, and Zeus killed Cronus. It didn't happen very often though, and usually requried Gaia's help.
you'd get arrested
You would go to prison.
If god didn't exist then the hole world and all the planets and galaxy's would never happen
In the year 2015. What would happen if a man said, that he was the son of God, or sent by God to be his profet?