And?

Well clearly the FBI don't find the Taliban bad enough for some reasons...

Or… it turns out that the FBI has specific mandates and they include things like “counter election disinformation” and it doesn’t include things like “report every bad guy on Twitter.”

This is only confusing starting from your own incorrect premise.

The FBI don't have "mandates" against the Talibans? That doesn't seem to make sense...

The FBI is a domestic law enforcement agency. The Taliban does not really break US laws as a matter of course. If you hear otherwise please report them to the FBI.

Honestly it’s not very fruitful arguing this stuff with someone who clearly doesn’t understand the basics of the American system. There are plenty of resources online to learn about all this stuff if you’re interested.

Literally first search result: https://www.fbi.gov/wanted/terrorinfo/sirajuddin-haqqani

The FBI: notoriously left wing

Lol

And your evidence of subverting the right wing here is that they reported people to Twitter for posting incorrect polling locations/dates?

Yeah there’s plenty to critique of FBI, but this is a profoundly weak case.

If you think that's the only piece evidence, I strongly suggest you keep looking. I'm not even a right-winger and it's obvious to me.