TTP was as such a non-entity but what is true is that a lot of Pakistani forces which were initially being sent to cover the moutain front ended up being deployed to the east. Hence the oft whined claim of militant haven did come true as the FC was non-existant as an effective force to check these droves of AQ, Haqqani, Taliban and other militants that came into the region. A lot of these people immediately got involved in turning FATA into the next Afghanistan.There is another perspective on the 2001-02 standoff, it was fist brought to my notice by Brig Samson Saraf (if I remember correct it was Brig Saraf) posting on the sadly defunct chowk.com. The perspective had two key propositions:
1. The mobilisation of Pak troops to the Eastern border forced it to substantially abandon its guard on the Western front where the Pak Army had the putative TTP on the mat. This allowed the likes of Baitullah and Radio to mobilise and eventually they would be a serious threat later in the decade.
2. This, along with the Parliament attack itself, was a deliberate act of the Indian Army/agencies in connivance with some foreign powers.
I am a peace loving Bong having remotely nothing to do with the business of fighting but experts here like @Oscar and @Joe Shearer may want to chip in on this.
Regards
India was looking to push militants into our territory so it could return to Afghanistan and th second front.