On logical scrutiny, the idea that Jesus came from another planet is in fact far less extraordinary than the idea that he is the one and only son of God
Yet far, far, FAR more extraordinary still then him simply being a mere mortal cult leader, possibly with delusions of divinity, whose cultists refused to accept his death and who was mythologicised perhaps even in his lifetime - all things we see even today…
The Master Jesus comes from a higher frequency of vibration of the planet Venus.
With that, you are not actually talking about interactions with extraterrestrial life, certainly possible by if incredible implausible, you are talking about gods and spirits hiding behind technobabble euphemisms. And here, Jesus being a godling from Earth - or just some powerful sorcerer? - is less extraordinary than being one from a different planet with drastically different atmospheric conditions that (would) mutually render their planet and ours hellworlds that are utterly impossible to survive even for moments on.
This he did through the practice of the higher forms of yoga, which he is presumed to have learnt on his largely undocumented travels prior to his main mission as recorded in the Bible.
Absence of evidence does not equal license to make up whatever you want to fill the gaps. And why do you even feel the need to justify this speculation when you’ve just dismissed Jesu canonical origin story entirely?
Of course, there is also the possibility that, you know, Jesus did not have any sorcerous powers, he was simply among the many, many people to whom such were ascribed by superstition back in the day, and that his life was fairly unremarkable until, at age thirty, he had a religious awakening…
And even if we accepted your claim that Christianity must have been influenced by Indian spirituality, there is no need for Jesus to have personally travelled too a such a distant land. While those that actually travelled the whole way were far and few between, not only was there very active trade (by immediaries such as the peoples of Arabia Felix (“lucky Arabia”) i.e. the regions close to the Indian Ocean), making an osmosis of ideas inevitable, but also, in the mid-third century BC, the Mauryan emperor Ashoka tbe Great had, after converting to Buddhism, sent missionaries in all directions including the Mediterranean, where they may have been the founders of a sect called the Therapeutae, which existed in Alexandria - the grand metropolis of the region and a centre of early Christianity - into post-Pauline times.