taliban are fighting against nominal muslims and secular muslims
"Nominal" Muslim!
You need to understand that anyone disagreeing with them an INCH is a "nominal muslim" for Taliban.
example, anyone not keeping his pants above his ankles is "nominal muslim" and deserves punishment.
that's why their comparison with kharijites.
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original kharijites fought against esteemed sahaba
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"esteemed sahaba" is your own opinion. these sahabas were "nominal" and "secular" muslims for kharijites. Actually, kharijites considered them kafir.