kai
ragamuffin
There is not a great deal to be interpreted as the bulk of Sharia is decided. What would need interpretation is laws relevant to things which have newly arised.
There is no Islamic countries today as that would be somewhere were Sharia is practised, there are only Muslim majority countries. Sharia is a complete system revealed by Allah and His Messenger and so you cannot accept part of it and reject another part - to do so is to imply that you know better than Allah.
OK
There is agreement by Ahlus Sunnah wal Jamaah that any ruler or government in the Islamic lands who rules by other than the Sharia is therefore an apostate and must be fought.
Does the Ahlus Sunnah wal Jamaah You mention have anything to do with Suleman Keeler?