You are absolutely correct. We can’t justify our sins by saying that Allah willed it. No one will accept to jump from a building saying that if Allah wills it, I will land on my feet because they know that this is their own doing.

My mum said that Allah has written it on your destiny that you commit sin so therefore it is not our fault, I told her it is true that Allah has written down in your destiny what sins you will commit, for example He know you will steal so he wrote it down in your destiny, He did not force you to do it but He knew you would so He wrote it in your destiny, is this true?