There is a clash between the Buddha's teachings and different sects.

In Theravada Buddhism, God does not exist,
prayers and worshipping are not important ( practising and cultivation is more important), and devotees do not vow to be
reborned in the Buddha Lands but to just attain Nirvana by themselves.

I've heard of no Theravada Buddhists speaking of to be reborned in the Buddhalands).

In Mahayana Buddhism, especially the Pure Land Sect, God and divine being exist. But is not Supreme ( Brahma, Indra..etc..), chanting prayers like "Namo Amitabha" and praying to Bodhisattva Avalokitesvara (a.k.a. Guan Yin in Chinese) to seek spiritual help and getting rid of suffering is encouraged, and the
devotees make great vow to be reborned in the Buddhalands like Sukhavati of The West.

While Tibetan Buddhism believes that that some skandhas (identity) of high lamas are preserved through rebirth (known as tulkus) such as the Dalai Lama, belief that a Buddha can manifest in human form, such as in the person of Padmasambhava, the saint who brought Tibetan Buddhism to the Himalayas.( Which makes a clash here. A Buddha is supposed to be free from the cycles of birth and death. Only a Bodhisattva wills to manifest, but the Buddha...