truly it is only associating others with allah in his divinity that allah does not forgive and forgives anything besides that to whomsoever he wills. whoever associates others with allah in his divinity has indeed strayed far away.
إن الله لا يغفر أن يشرك به ويغفر ما دون ذلك لمن يشاء ومن يشرك بالله فقد ضل ضلالا بعيدا