Religion is not so different from conspiracy theories, superstition or political ideologies. They are a bunch of bullshit believed by a large group of people, who find comfort and self confirmation in the fact that many other people believe in the same bullshit.
The only other value that makes the world religions any different from the others is age. They are much older piles of bullshit than the others. That is all. And while religious belief, if channelled into the right direction, can in fact concentrate the energy of the masses towards a most noble goal or at least an astounding achievement (the building of temples comes to mind - whether or not it was a noble undertaking, it was a huge achievement to build cathedrals and domes), it is also as easily abuseable for destructive purposes, such as the worst one: Holy War.
During the ages which were dominated by religions, little to no real technological progress took place, and much that had been invented before was forgotten. Only when scientific thinking emerged from its long slumber at the end of the middle ages, progress started to kick in and quickly, in a matter of a few hundred years, when before there had been thousands in almost stagnation, led to the industrialization and development of advanced technologies which would still be far beyond our imagination, had religion managed to withhold this way of thinking any longer. And don’t think that the churches didn’t try to. They did their best. Thank God (!) it wasn’t enough.
Believe what you want, as long as it doesn’t lead you to deny science. Because science is the only thing that’ll get us off this planet before it becomes inhabitable again, as it has frequently been in the past and will be countless times in the future.