The 14 Dalai Lamas for the past 600 years in Tibet are revered as the embodiment of Avalokiteshvara, the Bodhisattva of Compassion. A bodhisattva is anyone who, motivated by great compassion, has generated bodhicitta, which is a spontaneous wish to attain buddhahood for the benefit of all sentient beings.
The present Dalai Lama, now 85 years old, is known around the world for 60+ years for doing so and was awarded the Nobel Peace Prize in 1989.
A year later, Kelsang Gyatso began NKT as a political weapon against the Dalai Lama, his teacher from whom he broke away to export a Tibetan retaliatory 'spirit' called Shugden to the western world.
Since 1996, Kelsang Gyatso organized demonstrations against the Dalai Lama around the world and directed NKT to call the Dalai Lama a Nazi, Marxist, dictator, murderer, hypocrite, human rights abuser, traitor, evil, Muslim, cruel, pig, liar, false Dalai Lama, spiritual con man, one of biggest scams of the century, corrupt politician and CIA agent.
Free speech and 'religious' freedom allow Kelsang Gyatso to do so, though he despises these freedoms of others.
Unfortunately, unwitting followers and the public are misled, narrowing their appreciation and spirituality.
Please learn what you can before getting involved too deeply with NKT. Simply Google Kelsang Gyatso or NKT controversy or cult. You will find hundreds of thousands of Google results. Note the caustic comments from NKT followers.