Most of my religious beliefs come from experiences and personal evidence. The sort of thing where you have an experience and then extrapolate from that to get to something else. I started worshiping Kali cause I had a pretty profound experience. I had some faith in certain practices or the idea that those practices would benefit me and they ended up working etc.
Reincarnation is a pill I have a hard time swallowing. It's not even that it couldn't be true but every time I hear someone explain it to me or tell me about their own past lives I feel like I come away more baffled than helped. I'm not really secular but I think a lot of issues I have with reincarnation / rebirth can be summed up in this article by Doug Smith
A Secular Evaluation of Rebirth – Secular Buddhist Association
A few examples included in the article are things like the Buddha claimed to remember at least a hundred thousand past lives. This would easily put him into prehuman ancestors if we just go by the amount of years that would be involved in that. There is also the question about the trustworthiness of past life regression etc.
You can read the article yourself if you are so inclined. Lately folks on here have been talking about reincarnation and it just always seems a bit odd to me. If we have lived thousands upon thousands of previous lives then what does that actually mean? Does that mean that not all of our previous lives were human? If that is the case were they alien or how does that work? How does an animal make any moral choices without higher brain functions. I might be able to buy that a cat or a dog might be moral on some level but a hippo has the encephalization quotient which makes me think it literally doesn't make decisions it just sort of does things. It has the simple brain to body ration of 1/2789. That is lower than a shark.
So why believe in reincarnation? How would you answer questions about time spans and non human ancestors? Is it progressive or just something that happens?
I am not dismissing reincarnation out of hand, studying the upanishads and tantric texts have given me experiences which make me believe in things I never would have i. before. I am willing to change my mind I just don't think I can say reincarnation makes any sense to me at this moment.