Why are the major Islamic states concentrated in Asia?

Because Islam originated in the Arabian Peninsula in the seventh century A.D. Islam a traditional religion in Asia.?

Islam originated on the Arabian Peninsula, and this part of Central Asia has developed over the years to almost all follow Islam. Various countries such as Egypt in North Africa are also predominantly Islamic, south of Africa, which was originally a place of war. Religious wars in this region is not a great impact. South of Africa, the military government that came out of years of war has a strong controlling force, and the Islamic State can't develop in these places because after years of war, the people's minds are set. Also southern Africa has its own faiths, and there are no areas of chaos that have been unified by governments. It's also easy to develop a religion without resorting to extreme measures...?

The bordering Europe has the armed forces of the Warsaw Pact military led by the United States, making it difficult for the Islamic State to infiltrate him. Muslims are easy to spot in Europe because of their ethnicity. Moreover, Europe has experienced a number of terrorist attacks, for terrorist attacks already have a certain means of intervention, the Islamic State in Europe is difficult to get effective development. However, because of the chaotic situation in the Middle East, European countries are receiving refugees from the Middle East on a large scale. There are also seeds of the Islamic State among these refugees, only that they are now mesmerized by the flowery world in developed countries. They want to live happily ever after and have not rioted for the time being. The government does not believe in all the immigrants, because the extreme bad events of immigrants have happened many times, the control of immigrants has been strengthened, and for the time being, it is impossible to cause trouble. Europe also has its own religion, Catholicism, and it is difficult for foreign religions to develop their own followers in traditional Catholic areas.

Centered on the Arabian Peninsula, Europe to the west and Africa to the south. All already have tracks of significant Islamic activity. Only the East, which is a new and uncharted territory for them, so the Islamic State has been moving eastward in recent years.

May 23, 2017. ? Islamic State? militants stormed Marawi City, taking control of key installations in the city.?

On May 23, 2017, ? Islamic State? militants attacked stormed Marawi City in the southern Mindanao island in the southern Philippines, quickly taking control of key facilities in Marawi City after a firefight between military and police. The fighting has left at least 175 people dead, including 120 anti-government militants, 36 military and police officers and 19 civilians, according to a tally released by the military. They've been expanding eastward, so it appears that the Islamic State is concentrated in Asia. But it's also true that they are concentrated in Asia. Across the oceans they have a hard time reaching the United States, and both North and South America are Catholic by faith. Australia is also far enough away that they don't have the funds or power to reach overseas. ?