There is ample evidence that Lord Krishna existed.

We have a temple where Lord Krishna spent his childhood played with Balram.

Nandgram, where Krishna played

It is the Nandgram, not Nandhigrama.

Lord Krishna with Yasoda

It is near Vrindavan.

“A few miles from Barsana is Nandagram, another place where Krishna performed many childhood pastimes described in the Bhagavatam. On top of the hill is the main temple that has Deities of Krishna, Balarama, Nanda Maharaja (Krishna’s father), Mother Yashoda, Srimati Radharani, and two of Krishna’s friends. There is also a Shiva lingam in a small shrine across from the temple called Nandisvara, which again is said to have been installed by Vajranabha many hundreds of years ago. It is considered that this hill is an incarnation of Lord Shiva. From the top of the walls that surround the temple we can get good views…