People who travel in space are called astronauts.
Religion is not harassing people in reality,it is so called leaders are harassing people in the name of religion.
Islamic people (Muslims) travel to Mecca on pilgrimages
Jews religion is called Judaism.
Tecnically, the religion is called Islam and the people that follow the Islamic religion are called Muslims, so yes, being a Muslim counts as a religion.
Migration is cause of spread of religion. As people travel they bring along their religion, and the constitution does not prevent them.
What is now called indigenous religion
People who follow the religion of Islam are called MUSLIMS.
Christians.
Jews
Muslims
Muslims