The disbeliever is cursed or punished.
Let us ponder upon the precision of the words used to express the meaning: The verb (to be killed) is in the passive form and the one who does the killing is not specified. Certainly, there is a difference between death and killing. Death is a natural incidence which everyone will face, whereas not everyone will be killed.
ما(how): This word here brings a meaning of interrogation and wonderment regarding the man’s disbelief. As the wonderment is to be towards something which opposes that which is accepted by the intellect and logic. It is the denial of some people of the Holy Qur’an. This is because, according to logic, people should believe instead of disbelieve.
Then, the Quranic flow moves on to the topic of reminding the human being who disbelieves in his God of the origin of his creation: