Faithful advisors, thank you for your reports, these are pressing concerns, and i will deal with them all.
first the Immigration problem, i'm sure you all remember the pain we sufferd at the hands of the europeans in times past, so the eastern border must be patrolled at all times, warn all imigrants to stay away and if they still come, shoot them and any european immigrants already here they will have the choice to leave and if they dont then they will be taken into concentration camps that you will set up, just make sure they are out of sight of the people, as for the asian immigrants, they will be placed in immigration camps, where they will learn of our ways, and that of the islamic preachings. they will then, after three months in the camp, be tested to see what they know of our culture, if they pass, then they may enter our lands, if they fail, then they may chose to try again later, or leave the empire. you will have 30 currency to do this.
As for the religion problem, remember the great Caliphite of old. Islam shall be our offical religion, but people may worship their own religions freely, just give small advantages to muslims, Jerusalem, our Capitol, shall have temples of all peoples, but the temples preaching Islam shall be the grandest. All may worship freely, but try to convert the people to islam, you shall have 20 currency to do this.
As for the oil problem, this is more serious, attempt to encourage people to use camel transportation, in fact, set up camel caravans to transport goods, set up public transportation using camels, oil must be restricted for government uses only, set up train lines for the richer people, and strengthen the output of oil and coal, send the people in the concentration camps to mine the oil and coal, you will have 20 currency to achieve this goal
And this may not be a problem you have presented me with, but empires need armies, and we must have a large, trained, standing army. Focus it on camel cavalry and infantry, make it seem more attractive to muslims, as we need a largley muslim army, for a muslim empire, give bonuses to muslims who join the army, focus on making it large enough to patrol our borders, and make a small navy while your at it, maybe 1 ironclad and some smaller ships, you shall have 20 currency for this task.
Your Caliph has spoken, complete your tasks