Yes, there are approximately 30,000 different Protestant Christian sects.
I'm not sure what your point is.
It would be wrong to say, "Christians believe this way" about a lot of things in Christianity too, which is why I try not to say that.
There are quite a few things in common among Christian sects.
However, saying "According to MANY Christians...", "Accoring to Southern Baptist beliefs..." or "The New Testament says..."
The same as if you are talking about Hinduism.
That said, Hinduism leaves a lot more open to personal interpretation than Christianity in general without the necessity to form distinct seperate sects.
If you choose to believe Mara was real, yet Hanuman was just a fable, that's just fine.
If you choose to believe that Jesus was real, yet the Apostles were just fables, you have to form your own sect of Christianity.
I suspect the difference comes partly from Christianity having the Roman Catholic megalith behind it making "rules" to rebel and protest against.
its not clear how you establish that nothing can be determined as "true" according to hinduism or religion in general. It seems all you require for a truth to be degenerated is that it competes in an atmosphere with false truths.
For instance, before medical practice got standardized and instituitionalized in the west, did the plethora of magical tonic peddlers make the practice of medicine totally untruthful, or was it merely that proper medical practice was difficult to encounter due to so many baseless assertions?