How many refugees does it take to change a lightbulb? None. There are no lightbulbs at the bottom of the Mediterranean.
Why would you joke about someone else's life like that?
Lighten up, it's just a joke. Besides, guilty people should be dead.
Minimizing the struggles and difficulties refugees go through can be very harmful to others. Reading up on what refugees go through in both the countries they are escaping from and in their travels may make you take the issue more seriously.