Just because someone leaves a religion that no longer works for them, does it mean that they no longer love God or want to serve him?
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1- It’s a fact that a person cannot stay in a religion that no longer works for them.
2- If a person leaves a religion and becomes an atheist then yes, it does mean that the person no longer loves God nor wants to serve him. That’s obvious
3- If a person leaves a religion to join another one then it does mean that the person no longer loves the God of the religion they have left, nor wants to serve him. That’s obvious too.
4- God, the creator of all is the same of course, but different religions see Him in different ways.