Most "christians" aren't actually "blind". They "believe" what other people tell them to "believe", because they never actually read their own holy book. This isn't "blindness", it is ignorance and willful stupidity.
Of course "christians" aren't the only ones who do this. Most "religious" people do the same thing... they willingly allow themselves to be told what to "believe". Thus the phrase "Religion is the opium of the people".
And, to be fair, there are plenty of non-religious people that also choose the path of ignorance and willful stupidity.
I know a man who was a non-christian (I won't call him a "non-believer" as he was Muslim. He read the bible, and after having read the bible he became a christian. A second man that i know was a "believer". He read the bible, and after having read the bible he stopped being a "believer". And having visited many churches, I have met a few (sadly a very few) people who have actually read the bible. I have had good and meaningful conversations with each of the above. Not discussions of agreement, but intelligent discussions of meaning from informed perspectives.
I like picking on these so called "christians" who love to tell everyone what the bible says, but don't actually know because they are too lazy or too willfully stupid to actually take the time to read their own holy book. I suppose it is a bad habit, but I get a huge kick out of watching people make fools of themselves by claiming to know things that they don't know. Though honestly I, ultimately, fee sad for them... the claim such great and strong faith, but their faith isn't strong enough for them to find out the truth for themselves... No, they prefer to take the easy way and have other tell them what they should or should not believe. Again... this not "blindness" it is ignorance and willful stupidity.
Worst, by claiming they "know" the bible and its meaning, without reading it and studying it, they are essentially liars.
Of course this comment
also applies to the "believers" of other religions, who do not read their own holy book... and also to "non-believers" who tell people what the various holy book says without actually knowing.
The simple solution is: Take responsibility for one's own thinking and learn for oneself. That, however, is apparently a bad, insulting and childish opinion on my part.