I get why lots of people think that fundamentalism is the real hurdle to jump. Makes complete sense if you look around. Most of us can think about moderate, flexible religious beliefs. We can think about wicca, some forms of buddhism, taoism. We could even think about Santo Daime, or shamanism, as a system of beliefs and a view of the cosmos to which we could relate, as symbol or fact. It's a tragedy how the religious experience was kidnapped along with the word "religion" in our world, by toxic beliefs. Mostly abrahamic monotheisms. With placebo sacraments and power structures behind them.
I think the enemy is dogma. Dogma is completely made by man, it's the intellectual projection of hierarchy and control. Keeps religious experiences from being free and personal. Many people who don't behave like fundamentalists, who don't reenact every word in their holy book and in their preachers mouths, are still controlled by it. It's a brutal mind barrier.