If a person studied every religion in the world (thousands), one would not have time to do anything else, like make a living, eat, sleep.
Almost every person who is adamant that their religion is the one handed down by God, has inherited that belief from their parents and/or culture. A nomadic tribesman living in the midst of Muslims with be Muslim. A person born of Catholic parents, raised in that tradition, will almost always be Catholic. An Eskimo born of Eskimos... It has nothing to do with which religion, "...contain something of what god requires then it would be wise to examine them to determine which do and which don't..." First comes the indoctrination, then comes the "research" to prove that my religion is the one that represents the true instructions from God.
So logical it makes ya wonder why more people haven't thought about it this way huh?
And you know there are a lot of good rules & values in probably every religion.
It's a shame each sect seems to just have to go off the tracks and take it to a WE ARE THE CHOSEN ONES place. It's the whole holier than thou (no pun intended) and the relentless need to try and convert people to their particular dogma that causes a lot of the good in religion to be tainted and basically just not all that appealing.
But on the bright side dahermit... I can get you a good deal on some religious soap, watch...