Anyone can prove that the miracles of any kind in the major religious texts, actually happened.
Yes, that's right I am happy to become a Christian or a Muslim.
I'ld say that it would depend.
Showing a certain event actually happened, doesn't necessarily automatically demonstrate the proposed / asserted causal chain.
For example, take the resurrection of Jesus for example.
Let's say that for some reason we manage to conclusively prove he was crucified and then nevertheless was demonstrably alive and well days / weeks after the fact.
There could be any number of explanations here. For example, we have examples TODAY of people that were considered dead and then turned out not to be dead at all. Sometimes even during the funeral service. Like Bella Montaya for example. Declared dead TWICE and shocked her family by knocking on her coffin from the inside during her funeral.
The "miraculous" part of events concerns the causal chain. So it's the causal chain that must be demonstrated, not just that the event occurred.
Having said that, if we assume for a moment that it's actually the religion itself that is demonstrated to be accurate... then I would idd believe that a god exists.
Would I then become a christian / muslim / whatever? I'm not sure.
I would accept that the god exists. I don't know if I would become a follower / worshipper. That entirely depends on what parts of the scriptures are accurate descriptions of this god. Most certainly, the scriptures can't be literally true as written. The facts of reality simply demonstrate plenty of such literal things to be simply false (genesis, the flood, exodus, etc).
If the god of the bible turns out to actually exist AND his character depiction of the bible is accurate.... then I would consider the dude to be a celestial all powerfull Kim Jong Un.
I don't think I'ld be capable of "worshipping" and "loving" such a monstrous, barbaric entity.