Again u r not understanding...as per ur own post...who is funding these 30,000 to 35,000 member TTP since 2001? It is 2021 now...that is two decades. Are u suggesting that Pakistan is funding TTP to attack Pakistan...and then also spending money to deploy it's military to fight TTP? Do u know how retarded that sounds?
Obviously Pakistan WILL not fund a militant organization...that is fighting Pakistan itself. So who has funded TTP for two decades? It doesn't matter who they are...they can be Afghans, Pakistanis, Irani, or even martians...the point is someone is funding them. No other country would gain anything by funding an anti Pak militant organization...other than India.
You could not be a good investigator! Sorry to say that-
As said by UN Website, Tehrik-e Taliban Pakistan (TTP), also known as the Pakistan Taliban, is an alliance of formerly disparate militant groups that came together
in 2007 following Pakistan military operations against Al-Qaida-related (QDe.004).
The same Terrorists were living in Pakistan from 1979, funded and arm supplied by the US with help from Pakistan. Once you took the U-turn when USA threaten you to send stone age then only these terrorists went against your army.
More about cause of the terrorists attack in Pakistan;
Blowback in Pakistan
As the Afghan Taliban’s insurgency took shape, a parallel Pakistani Taliban insurgency arose on the other side of the 1,500-mile-long border, stretching from the Northwest Frontier Province (NWFP, since renamed Khyber Pakhtunkhwa) through the Federally Administered Tribal Areas (FATA). Pakistani Taliban militants have focused on waging a violent campaign against the Pakistani state and all those they consider rivals. With ties to al-Qaeda and the sectarian terrorist group Lashkar-e-Jhangvi, the TTP is implicated in the
surge in violence against Pakistani Shias, whose beliefs it considers heretical.
Under U.S. pressure to rid the FATA of al-Qaeda, the Pakistani military conducted operations in the territory for the first time in July 2002. These incursions turned many militants against the state. So too have Pakistani security forces’ actions against residents suspected of aiding Pakistan’s Taliban. Their operations have entailed mass displacement, and international human rights groups and journalists have implicated Pakistani security forces in torture, extrajudicial killings, arbitrary detention, and forced disappearances. These abuses, for which the FATA’s frontier legal status offers little means of redress, has left tribal-area residents stuck between two forces seemingly indifferent to their rights.
Two particular incidents galvanized Pakistani Taliban factions to join forces against the state. In 2006, a CIA drone strike on a tribal-area madrassa reportedly killed eighty-three students. A year later, Pakistani special forces seized the Red Mosque in Islamabad, killing dozens of student vigilantes and militants who had occupied it. By late 2007, some thirty militant groups declared the formation of Tehrik-i-Taliban Pakistan. Though nominally loyal to Mullah Omar, they have ignored his reported entreaties to de-escalate their fight with Pakistan.
For many years, Pakistan sought to contain the rebellion by negotiating truces with some militant groups while fighting others. The United States, among others, criticized these deals, saying they allowed Taliban factions to consolidate control. They also elevated the militants' status as interlocutors while undermining the political agents and tribal intermediaries who had long been central to the FATA’s governance, according to some regional analysts. Taliban assassination campaigns targeting tribal elders have further undermined governance there.
Metastasis in Pakistan
The Pakistani Taliban remain less constrained by a desire to build political legitimacy, but also more fractious than its Afghan counterpart, regional experts say. In Pakistan the Taliban has waged a lethal campaign against girls’ education and
polio vaccination, accusing
public-health teams of conspiring with the West to sterilize Muslims.
Pakistani ground offensives and the U.S. drone campaign, which took out successive TTP leaders Beithullah and Hakimullah Mehsud, have put the Pakistani Taliban under pressure. Under Hakimullah's successor, Mullah Fazlullah—former chief of the Swat Taliban—leadership squabbles have splintered the tribally diverse umbrella group.
In the summer of 2014, the Pakistani military launched a long-anticipated offensive on North Waziristan, long a
hotbed for the Haqqani network and other militant groups. The United States escalated drone strikes in support of the Pakistani operations. Already under pressure, various factions left the TTP umbrella. Meanwhile, some
foreign fighters have left the region to fight in Syria.
The Taliban returned to power in Afghanistan in 2021, twenty years after their ouster by U.S. troops. Under their harsh rule, they have cracked down on women’s rights and neglected basic services.
www.cfr.org
Everything between US, Afghanistan, Taliban, and Pakistan with their blunders. But till easy target is India to blame.
- I like your below bold lines 
