Is it considered an act of disbelief (kufr) on the part of specific individuals who deny Allah’s names and attributes, and when does this occur? Are they excused due to ignorance of the Qur’an, and when does the Qur’an become a decisive proof for which ignorance is not an excuse? What about specific individuals who claimed that the Qur’an was created?

It is not permissible to declare a specific individual an infidel (kafir) until proof (hujjah) has been established against him. It is often the case that one who denies the divine attributes does so out of ignorance or misinterpretation (ta'wil), and these are impediments that prevent declaring him an infidel. A distinction must be made between judging a statement and judging the one who says it. A statement may be disbelief (kufr), yet its utterer is not judged to be an infidel until the conditions are met and the impediments removed. One who says that the Qur'an is created is not judged to be an infidel until proof is established against him, just as Imam Ahmad did not declare Al-Ma'mun and Al-Mu'tasim infidels. Issues of declaring someone an infidel should be referred to scholars, and it is not appropriate for a layman or a beginner student of knowledge to delve into them.