I am interacting with people from the r/exbahai subreddit on reddit, and although most of them consider themselves to be atheists, they all seem to to unanimously have a deep religious belief in modern Western liberal values. The way you can tell that their belief in these values is religious is that they all universally get angry, aggressive, hostile if you blaspheme these values, just like a Muslim would get angry if you blaspheme the prophet Muhammad.
These aren't people who simply stopped believing in God. These are people who traded the Baha'i/Abrahamic god for another (the God of liberalism).
This makes me wonder if it is possible at all to be a true atheist. Or maybe true atheism is the same as true theism, because neither worship idols, and what remains is God.
Probably it isn't. According to Godel's incompleteness theorem you need axioms to reason from. To get anywhere with reasoning you would probably need some kind of cohesive grouping of axioms, which could be described as a religion.
It's easy to be an atheist when people don't understand what God really is, and they are not interested in finding out what's behind the symbols. Some of them will eventually turn their backs to the empty Western brainwash.