All evil and misguidance is from Allah and this is a fundamental belief of Islam. Allah may use the means of cancer, AIDS, poverty, etc. but they are all from Allah . Your saying "it's NOT TRUE" without any evidence, especially contrary to what the Qur'an has said, is you treading on dangerous grounds. Do you not understand that the opposite of guidance is misguidance? Do you not understand that the Qur'an says that Allah guides whomsoever He wills and leads astray/misguides whomsoever He wills? To say that Allah did not create cancer is going against what He has said in the Qur'an: الله خالق كل شيء. In Surah aal-'imraan, the following is mentioned: قُلِ اللَّـهُمَّ مَالِكَ الْمُلْكِ تُؤْتِي الْمُلْكَ مَن تَشَاءُ وَتَنزِعُ الْمُلْكَ مِمَّن تَشَاءُ وَتُعِزُّ مَن تَشَاءُ وَتُذِلُّ مَن تَشَاءُ ۖ بِيَدِكَ الْخَيْرُ ۖ إِنَّكَ عَلَىٰ كُلِّ شَيْءٍ قَدِيرٌ So, everything positive and its opposite negative comes from Allah . The means may be different (e.g. shaytaan, other men and women, diseases, poverty), but they inevitably do come from Allah .