Question: A person does not commit disbelief that expels him from the religion if he did not intend what he did or said or he is ignorant and does not know and falls short with an opposition. Based upon this principle, many of the innovators go on defending their innovation due to them believing this innovation to be truth. Are they rewarded for their innovation if they believed it to be truth?
Answer: “These people are misguided and not rewarded, but rather sinful if the truth is clarified to them and they continue upon their misguidance. This is because every innovation is misguidance and every misguidance is in the Hell-fire.
As for if they think that this is truth, then they are rewarded for their intention, however, they are not rewarded for their action because it is not legislated”.
[Taken from: https://shamela.ws/browse.php/book-7687/page-4956]
Faisal Ibn Abdul Qaadir Ibn Hassan