Multiple postulates, who is right?

“A preist, a physicist, a geneticist and an Arab are trying to take out the world. Who succeeds first and why?”

“Do they walk into a bar?”

“The priest theorizes that we are all immoral and doomed to die for our sins, the geneticist--viruses are becoming stronger and more virulent and they will eventually kill off our species.. the physicist postulates that the stars, the sun and the earth will die...”

“...the Arab just himself up?”

“blows”

“O'boy, I can already see what the next Innuendo to this one will be!!! LOL”

“.”