They crashed the economy(commercial Banking) , and invited Islamic Banking.

They indirectly, land crashed the Economy, and made the Commercial Banking sector unattractive.

Even when many Economist, World Bank and IMF warned of a possible crash of the Economy they ignored them, and kept withholding Fund, and always blaming past Administrations for their failures, which many Gullible Nigerians believed and joined the bandwagon by always blaming past administration.
But just few days ago they surprised everyone by opening an Islamic Development Bank, which Goodluck Jonathan administration rejected during his because it Islamic agenda.
Many people do not understand what is going on. But from the little I know about IDB, their agenda is to come to Nigeria, and start given Free loan without interest, to many states, and individuals. And through that way they they will penetrate every nooks and cranny of The country. Remember that Turkey was once second catholic nation after Rome, but today they are topping as the second Muslim nation after Saudi Arabia ... it didn't happen by magic but by strategy...

I know you would want to ask me how?
Yes by the time they start financing some states(starting from the North) with free loans or no interest loan with longer time period of payment, then states Governors from Southern parts (e.g Rochas) will run to them for help and they(IDB) will give them conditions before such they can take a loan... and such conditions includes as follows :
1) declare ur state an Islamic state and/or
2) help to site Mosque in some strategic area of ur states(Such Govt houses or close to government properties), as it is happening in Imo state now. And/ or
3) stop people from praying outside or having crusade, and u can do it by creating policies that will make the people agree with u.. like it it happening in Kaduna that use to be a very beautiful Christian state or liberal state.
4) and maybe force some state civil servants or poor people to convert to Islam (a similar thing happening in Imo state).
And/ or
5) they will also influence many business to come take loan, and from what seeing, we will begin to here name like Alhaji Ibrahim Mmaduabuchi, founder of so so company....

Once they have given loan to some rich Industrialist, others will abandon normal commercial Loan system which sometimes require higher interest rates... who would like to borrow money with no interest to grow his business,? So from the rich men their families will convert, and they will keep disturbing their state Governor to recognize Hijab as it is already happening in Osun state. And through the rich man they will be given scholarship to poor people, creating jobs to our youths, given cash or gift to our poor people, and later urge them to convert if want to continue enjoying such gesture, and that is how it will spread across to everyone, just like it has happened in some communities in Imo state where their kings converted and used his money and influence to convert others, (e.g Umuofor autonomous, Oguta LGA), infact they celebrate salah and observe all the Islamic holiday in those communities.

Recently I saw an Igbo man who converted to Islam because he was promised a senior rank in the Air force..

Have you ever wondered why Fulani herdsmen activities increased to an unprecedented height lately, ? Yes they increased it so that they will put fear in everybody so that everyone will start supporting the Grazing Bill, as is already happening in Jos.

So that is the same strategy applied in the banking sector. They made it unattractive, and crashed the economy so that people will take because of hunger to support the Islamic Banking system as the best alternative to reduce hunger and bad economy.