Lets take a little break from politics and have us a real atheist conversation.
Personally, I’m open to the idea of the existence of supernatural phenomena, and I believe mainstream religions are actually complicated incomplete stories full of misinterpretations, misunderstandings, and half-truths.
Basically, I think that these stories are not as simple and straightforward as they seem to be to religious people. I feel like there is a lot more to them. Concluding that all these stories are just made up or came out of nowhere is kind of hard for me.
Why is it not a valid argument?
That’s already been explained to you by others here.