Islam do not ask anybody to become muslim. Person can be termed as muslim, even without joining Islam... If he/she follow same path defined in other religions.
Muslim are considered as person who have belive in God and he considered killing of any animal or human for joy or satisfaction being termed as Kafir or Murder of total humanity.
If any person has been convered to Islam by force do not become Muslim till he follow part mentioned in Quran.
I would request dear friends, message from god is not known to many of people. I would suggest please read message from god.
Do not type cast any religion based on worng doing of single or group of people.