You think they could not survive for millions of years, that if they were around that long they would have flown apart. That is unstable.
Its only unstable in an old universe model. If I don't eat, I am at risk of starving, but I don't constantly need to be eating to remain "stable". The galaxies can easily last thousands of years without blowing apart.
Actually that is a Creationist argument and they assume there isn't anything holding the galaxies together.
Dark matter was a result of scientists confusion as to how the galaxies were staying together. In the words of the scientists themselves, the galaxies should have fallen apart. Therefore, in order for the universe to be in the state its in now, AND be billions of years old, dark matter had to be made up. This is not a "creationist" argument at all. That is how dark matter came about in the minds of scientists.
You call it a religious doctrine but the age of the galaxies is what the evidence tells us. Proposing dark matter was not based on the age of the galaxies, it was based on their rotation. It sounds like you are hiding behind the very lack of evidence you accuse the scientists of. You assume the galaxies are unstable and flying apart, and that we haven't seen the evidence because we haven't observed them long enough. At least science is looking for the dark matter. In the mean time we live in a universe with multiple billions of galaxies all busy rotating away, with no hint of any instability except where we see collisions or black hole tearing them apart. Yet oddly, we see evidence for those kinds of changes, but none for galaxies flying apart.
Perhaps you shouldn't over read into what people say. I have no idea why you think I believe galaxies are flying apart. They should have flown apart under an old universe model, but under a young universe, there is no problem.
Maybe you should look into why scientists came up with dark matter.
Let me expand on the ball example I gave.
Pretend God created a new universe that was just a hill, a ball, and 2 people. When created, the ball is already halfway down the hill in motion toward the people standing at the bottom. God says to the people, "I created that ball halfway up the hill." but one of the people says, "Well if we apply the laws of physics to it, we can see that the ball actually came from the top of the hill. The speed it was going and the direction it was coming from indicates that it wasn't made halfway up the hill, but actually it came from the top of the hill. Sorry God."
Now the second person says, "Well wait a second. If we run tests on the ball, we see that it only has enough dirt on it to have come from halfway down. Since we know the rate the ball would pick up dirt, it can't have come from the top. God must have been right when he said he made it only halfway down."
First person replies, "There must be an invisible dark barrier that kept the ball from picking up dirt."
Lack of evidence and the ability to test it is always going to be there at the edges of science where we are pushing our knowledge to its very limits. The problem creationists have is they are trying to argue against science that has already been well established and confirmed from multiple directions. All creationists can come up with in the face of established are argument based on lack of evidence.
I think you just broke my irony meter.
It is the Higgs Boson they are looking for there. If they search through all the possible energies and don't find it, you will find scientists will stop thinking it might exist. Not sure why string theory should be abandoned if it does not exist, we have only just begun to track down the different particles and they are pretty difficult to find. String theory will be abandoned if a better explanation comes along for all the particles we know about as well as the one we will discover in the future.
.
So until a better theory comes along, we should all hold to these theories on faith. You believe the best explanation is convoluted, unfalsifiable hypothesis on dark matter and bouncing membranes. I believe the best explanation is God and what he has revealed to us in the scriptures. One of these sides is static, the other constantly changing because its never quite right.