Why is religion considered true to some people even though, when you do read a religious text some get a different perspective and if some interpret it differently how do you know that it's true?

I noticed quite often that I will look at different religions and some people who share the same religion will get two completely different perspectives. I am very curious as to, how is this possible ? If god is/were real, wouldn’t he want the same perspective to be spread out and the same between everyone so that it doesn’t get misinterpreted?