Luther was preaching heresy - things that were totally contrary to Catholic Doctrine - and leading others astray. He was asked to recant his teachings and repent. When he refused, he was officially excommunicated.
because he decided to start a fake religion
Not appearing at the Diet of Worms
Because he wouldn't recognize his authority as a pope.
The Eastern Orthodox Church.
Leo threatened Luther with excommunication if he did not recant his 95 demands. Luther refused and was excommunicated.
If the place is Constantinople then the answer is: because he wouldn't recognize his authority as a pope.
The Pope during Martin Luther's posting of the Ninety-Five Theses was Pope Leo X.
yes
excommincated luther
Pope Leo X, who was pope from March 9, 1513, to December 1, 1521, excommunicated Luther.
yes
Pope Leo X