Well, as I was driving home last night, I thought, if I had a time machine, I'd go back in time and kill all the people who started "religions". (Then I wondered if Abraham actually existed... and Moses...) So my plan for having a time machine was to go back and kill Abraham (who started Judaism) if that didn't work, then kill Moses (since he was the guy who wrote down all the stuff). Then kill Mohammad (am I now going to be a target of a fatwah?). Of course killing Abraham should end all the Abrahamic religions like Judaism, Christianity, and Islam. But just to be safe, work backwards...
I thought how many issues today would be solved by a lack of religion? There wouldn't be Islamic terrorists. There wouldn't be the religious right who likes to concern themselves with the worlds bedrooms. There wouldn't be zionists who want to rebuild the temple. Maybe the earth would be better?
Most religions have one thing in common. It can be summed up in Christianity by the Great Commission.
Matthew 28:19-20Islam probably has something similar, where the people are commanded to go out and convert the rest of the world. The reason bad things happen is because people aren't fulfilling the commission and god is angry.
Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost:
Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you always, even unto the end of the world. Amen.
One of the greatest aspects of multiple religions, is in knowing that you are right, and everyone else is going to burn in hell.
So, how do multiple religions disprove time travel? By the fact that they are still here. No zealot in the future has commandeered a time machine and gone back to "fix" a historical mistake (other wrong religions).
How many Christians today would get in a time machine and go back and witness the birth of Jesus? How many would go and watch the resurrection? How many would watch the crucifixion? If that were possible, the heavenly host that sang to the shepherds would actually be time travelers and not angels. (If time travel were possible, I'd hope that some time traveler would go back and actually make some historical evidence for all that happened; can't you bury a scroll or maybe have some record, perhaps have some non-debunked stuff in Josephus account...)
How many muslims would go back in time to spend time with Muhammad?
How many Jews would go back to be with David, Moses... the prophets?
Just going to these events is one thing that most followers would want to do if there was a time machine.
BUT, a zealot/fanatic/terrorist would take it one step further. Some christian would get in a time machine and kill Judas. Someone would kill Pilate. Someone would do something to prevent Jesus from being crucified.
Someone would do something to ensure that Islam is the only religion being practiced. Someone would do the same to ensure that Judaism is the only one. If time travel were possible, this would happen. Heck people think if there were time machines they would kill Hitler.
But we are where we are, because there are no time machines.
The flaws of modern religion prove that time travel won't ever happen.
I think the seeds of this were put in my head on Sunday when I was watching a thing on Stonehenge, and they were saying that they thought Stonehenge was for religious rites to communicate with the dead. At the end of the show, they said something like the only way to know for sure would be to get into a time machine and go watch.
Which made me think, that if there were time travel, then Stonehenge wasn't there to talk to the dead, but it's actually there to talk to the future.