Changing religion is a very common thing. Cos many people don't really understand what religion is about. Some people change religion at the point of dying so that after they die, their family members or relatives of the same religion will pray for them.
When a person is about to die, that person will be very afraid, cos don't know where he will end up at. So whichever religion that can guarantee him a safe place, he will just accept and convert to that religion. These are the people that when young, healthy and in comfort zone, they will "enjoy" life to the fully. Religion is never in their mind. When only time to go is near, then only worried about the next destination.
We need to start our spiritual practice now and prepare for our death. We do not know when is our last day. Our futures depend on the present. There is no short cut to be out of samsara.