Free will and belief in divine predestination
Assalamoalaikum,I have a few questions related to the divine decree.First is everything that happens in this world has already been decided by Allah,so then if we say that 'such-n-such became the cause of this also knowing and believing that it happened because Allah willed it to be so is it right to say that? Also is it correct to regret previous actions because of the consequences that he or she is facing today and wish that he or she had not done that?And also if someone does not say the term 'INSHALLAH' after he decides to do something maybe because of forgetfulness or because its understood and in his heart he knows that it cannot happen unless Allah wills it to, then is he out of the fold of islam?Thanx for your help and may Allah bless you all.