In this timeline i'll answer what would have happend if Turkish scientist had made an atom bomb in 1930. If anyone could have made it this early, it would have been the Turks.
1932: The Turks send a secret agent to steal Einstein. They find out that he's really a Turk and a muslim.
1933: Turkish scientists finish developing an atom bomb. They try it out on Athens. The city gets destroyed and Greece is incorporated into Turkey once again as the terrified population of Greece surrenders.
1934: most of the Balkans south of the Danube is forced to join the growing empire of the Turks. The western powers have to surrender the arab world to the turks. Everyone who lives in areas conquered by Turkish forces is forced to convert to Islam. The punishment for refusing is death.
Over 1000 A-bombs are made. As the muslim world, from Marocco to Indus, is united under Turkey the world trembles in fear.
1935: Turkey starts threatening western Europe, and conquers Georgia, Rumenia and most of Hungary.
1936: Nazi Germany, Italy,France, Spain, Britain, Poland, The Soviet Union, Japan and the USA form an alliance against Turkey.
The Turks answer by destorying Paris, Berlin, London, Moscow, Rome, Tokyo and Washington with nuclear weapons.
Everyone in the western world starts hating and fearing the awesome might of Turkey. A large Turkish army conquers Italy, while Milan, Florence, Naples and Venice are destroyed with nuclear weapons.
1937: As 30 more cities around the world get destroyed in the nuclear onslaught, the states of the world start ignoring Turkey's nuclear threats, and start sending countless soldiers to the frontlines. As the turkish army is quickly pushed back on the frontlines, the Turkish officials become frantic and start using nuclear weapons at the frontlines.
1938: USA, Britain and nazi Germany all acquire nuclear weapons. The nuclear war enters it's final stage, as A-bombs are dropped on Constantinople, Ankara, Damascus, Cairo, Jerusalem, Alexandria, Tunis, Sofia, Smyrna, Baghdad, Teheran, Medina, Mecca, Kabul and Islamabad.
Enemy soldiers swarm over muslims lands, soiling it in the process.
1939: Muhammad (peace be upon him), the beloved prophet, returns from heaven, and takes command of the remnants of the Turkish-muslim empire. He summons more A-bombs, and under his command the Turks mangage to exterminate every non muslim man on Earth. Women and children are not held responsible, however, and Jesus convinces them that he is NOT the son of god, and that Muhammad the wise is really the greatest prophet. Then Muhammad the great rebuilds Mecca in 6 days, with his friend Jesus.
Muhammad is wise, Muhammed is merciful. Muhammad convinces God to shorten the sentence of the unbelievers in hell, from eternity to a mere hundred million years, and thus this alternate timeline comes to an end.
1940:
