You wrote:
“You need to review history. Specifically Indo-Aryan culture.”
No, I don’t. What you’re suggesting is just a nutty theory that no reputable scholar can produce any evidence for. What happens is that idiots, not knowing how to think or not knowing how to handle evidence, make the mistake of concluding that two things with slightly similar sounding names or traits or both must be related. This is why George Armstrong could actually delude people into believing there was some relationship between “Isaac” and “Saxon”: “Isaac”, “Isaac’s son”, “’saac’s son” = “Saxon”. Clear as mud.
Not only is the existence of a proto-Indo-European culture generally accepted in academia, it also is consistent with Biblical accounts.
Using the term ‘Easter’ for Resurection Day is limited to English I think, with most languages using a cognate of the Hebrew ‘Pesach’ (Passover) for the day.