Just a quick correction .. The God of the Bible revealed himself before Hinduism started, i used to be a hindu.
The God of the Bible has always revealed himself since the Beginning, and the Bible is a trusted book because it is historical, it was written by eye-witness accounts, it is more reliable than a book such a Quran that appeared out of nowhere some 600 years after Jesus.
The Jews in the Old Testament knew who God was in the Old Testament, they knew who the true God was, God revealed himself from the very Beginning, in Genesis we see that it says "Adam walked with God"
God revealed himself VERY clearly. Religion ... is manmade, its ritualistic, full of tradition, and is man-s way of trying to get to God.