Most people I've discussed God with, especially Christians in online forums, assume that I'm an atheist even though I no longer label myself that way. I ask a lot of questions about theism and religion and expect honest, sensible answers, but I don't tell them I'm an atheist.
You expect honest, sensible answers about theism but you withhold that you are an atheist? Theism is with gods, atheism is without gods. You can believe in gods while being without them. I'm apolitical. Without politics. I believe in the existence of politics. The demons don't believe in God they know God, and yet shudder.
I also have what I think are convincing arguments that Gods are human creations and that miracles don't happen.
Nobody cares. It's ideology, again, comparable to politics. A person of a certain political affiliation will believe if their brand appears to be in charge, everything is good, except for that the other brand is a threat. Logic, facts, reason, truth, data all become useless. Only used as talking points. A god is anything or anyone venerated. Of course, gods are human creations. So is money. The point is moot, except for ideology. Waste of time. Like WWF wrestling. A divide and conquer, bread and circus performance of ideology.
So what's going on with me?
Nothing, really. Maybe ideology? I can't really say for sure since I don't know you except from this post.
As odd as it might sound, in a way it seems that yes, I do believe in God. I was a Christian into my early twenties having been Roman Catholic and then evangelical. I don't think I ever completely shook all that indoctrination. Although belief in AZ
So, in essence, you believe in specific religious ideologies, not God?
So yes, I think an atheist can believe in God. To smooth over that paradox, let's say that an atheist reasons that no Gods exist, but belief is another matter.
Belief doesn't matter. Existence isn't dependent upon it. Gods without question exist. What you seem to be doing is assuming (probably an occidental) variation of God, from the Bible, who is named Jehovah, means God. Jehovah was a god of many gods. The Bible calls Moses God, the judges, angels, idols, "worthless" gods, etc. The Bible says Satan is the God of this world. Before Jehovah created anything, he wasn't a God. Only becoming a god when people venerated him. He said he would become a God to Israel. If no one any longer worshipped (venerated) Jehovah he wouldn't be God anymore. You see? He would still exist, but just no longer be a god, or God. So, outside of that Abrahamic paradigm and even within it there are many gods. A god doesn't have to exist to be a god, anyway. The question of existence, if not specific, is pointless.
So let me say that I'm a "rational atheist" in that I doubt God based on reason rather than lack of belief.
I seriously doubt that. If it were true, you would be the first such case that I would have encountered and I've talked to thousands of them. I was one myself and I certainly didn't fall under that "reasonable" category. Your post doesn't indicate that being the case. Your religion has only shifted slightly from when you were "Christian." It's just another side of the coin of ideology. Nothing to do with reason. There are no rational atheists and very few rational theists.
Or to dispense with theistic labels completely, let's say I'm a "truth seeker" who has found that belief in God is to believe a lie.
Nonsense. What difference would it make if it were a lie? Or "truth?" You aren't really seeking anything except for possible confirmation bias. If you sincerely believed "God" to be a lie you wouldn't be seeking God, would you?
ETA: I was speaking ideologically regarding the existence of "rational atheists." I think atheism is rational, but fundamental militant atheism isn't rational in my experience, both personal experience and observational.