How did decius treat the christians

Decius was not very fond of the newly emerging religion, the Christianity, but also of all the other religions that were not Roman. In order to make the people give up on their beliefs and accept the Roman beliefs and culture, Decius made a law. The law was that all the people will be able to chose between their own beliefs (Christianity and the others) and death. Now this law was pretty much set in order to terrify the people because if they chose their religion it meant that they were going to end up dead, so most of them practiced their beliefs in secrecy. It most commonly referred to as a lawful action by Decius in order to stop the Christianity, but in fact it was meant for all the religions in the Roman Empire that were not in accordance to the Roman beliefs and religion.

the arab empire adopted the muslim religion as their main belief. arabs would influence the people from the territories they invaded towards islam (the muslim belief).

nevertheless, throughout the history of the arab empire, rulers brought intellectual individuals from other religions to their centers of learning. these other foreigners included jews, christians, greeks, persians, and indians.   these resulted in the adoption of important knowledge developed by these cultures by the arabic empire. for example, the works of aristotle were translated from greek to arab and indian scientists brought the numerical concept of "zero" to the arabs.

nowadays, 93% of the arab population is muslim, which at the same time is subdivided in sects including the sunni, zaini, alawi, shia. the remaining 7% is composed mainly of christians.