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You may have spoken to many religious people, but you have not evidently spoken to any Christians
Actually, the majority were, or at least called themselves, Christians.
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(or, at least, certainly not any mature or educated ones)
This is an innappropriately facetious remark that does little to support your point of view.
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Of what rationally-based obstacles do you speak? I know of none.
Some examples from history may help your memory:
1) Galileo was forced to essentially retract his view that the earth revolved around the Sun rather than vice versa by none other than His Holiness, the Pope. Even with the retraction, he was still made to spend the last thirty years of his life under house arrest.
2) Many Christian sects have, even today, great difficulty in accepting the Theory of Evolution in preference to the Intelligent Design assumption implied in the Bible. Nevertheless, the Catholic Church did, in recent years, issue an encyclical more or less proclaiming the validity of evolution. However, this was 141 years after the publication of Darwin's "Origin of Species".
As a footnote. it is interesting to recall that Darwin delayed publication of his treatise for about twenty years, exactly because he feared the negative outcry that would result from various religious bodies (and he wasn't wrong).