Thats because Obama is liberal.
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Actually, I think it is because Obama is a Muslim and a Sunni to boot.
"The four countries with the largest Sunni-majority populations are Egypt (where ~99% of Muslims are Sunni), Indonesia (~99%), Bangladesh (~99%) and Pakistan (~87%). Of these, Pakistan is expected to have the greatest annual growth in its number of Sunni Muslims. Indonesias gains will be more modest."
Source: Pew Research: Relgion and Public Life Project
If 99% of the Muslims in Indonesia are Sunni, then that is probably what Obama grew up learning.
I completely believe that he is. He said so himself, before George Stephanopoulos helpfully corrected him.