Re: wats khilafah abt.
Secondy islam is the only ideology which has a spiritual and political aqeedah i.e it has the spirtual link to creator and it has political aspect to deal with lifes affairs including the running of a state.
ok wat abt the time when umar khatab{r/a} went to palistine where the christians not rulein that land at the time or may be a better example would be at time of alexander when he took over the babylons they were prety advance civllisation but yet they were very rilgios.