the point of matter is why these so-called taliban is against Pakistan? who is financing them to buy weapons???
more importantly, how weapons are supplied, CIA is their, NATO is their, American Forces are their, how come these terrorists are operating their network? funds transfer? weapons supply?
Let me think why the Taliban is against Pakistan.
1) Pakistan turned on the Afghan Taliban in 2001 after deciding supporting them was no longer in the national interest
2) Pakistan is trying to prevent the Taliban from waging what the Taliban believe is a jihad against the Americans, meaning that to the Taliban Pakistan is aligning with non-Muslims against Muslims.
3) Pakistan is trying to prevent the Pakistani Taliban from running their own state in the FATA
4) In trying to prevent Pakistani soil being used as a base for anti-Afghan attacks, Pakistan is fighting the Taliban. Usually people turn against those who are fighting them.
5) Pakistan has identified groups based in the FATA as being behind several bombings; the Taliban do not permit Pakistan investigative agencies to operate in areas under their control so to bring the perpetrators to justice government control needs to be established in those areas, which means fighting to defeat the Taliban. As before, once you start fighting someone they usually turn against you.
The FATA has a relatively open border with Pakistan and Afghanistan, due to the difficulty of policing it and the problem of smuggling. Weapons are easily available on the black market due to governments commonly selling unneeded weapons to independent arms brokers, or to smuggling. For example, machine guns looted in Albania by the mafia were sold to arms dealers to sold them to Rwanda (where they were used in the Civil War) who then sold them to the DRC. It's estimate that each year, $1bn worth of weapons enters the black market where they are available to anyone with money.
As for money - I'm not going to bother with the drug allegation, but news reports from the Pakistan press over recent years have made it clear that the Taliban tax residents and merchants in the areas under their control. There's a steady source of revenue directly for you.