Taliban are Kharijites?

"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.

[quote]
original kharijites fought against esteemed sahaba
[/quote]

"esteemed sahaba" is your own opinion. these sahabas were "nominal" and "secular" muslims for kharijites. Actually, kharijites considered them kafir.