What is the basis for declaring something as disbelief (takfir) regarding utterances that contradict the foundation of faith? Is it the belief in the true meaning, especially if these utterances are not expressed in a manner of insulting religion or belittling it?

The ruling on uttering words that contradict the essence of faith varies depending on the word and the intent of the speaker. Some words lead to disbelief simply by uttering them intentionally, such as insulting God. Others may not lead to the speaker's disbelief due to the presence of impediments like ignorance, error, or absent-mindedness, as in the hadith of the man who said: "O God, You are my slave and I am Your lord." Ambiguous and equivocal statements cannot be ruled as disbelief for their speaker as long as they admit multiple meanings. The primary goal is education, guidance, and advice before ruling with disbelief, while being mindful of the seriousness of declaring someone a disbeliever and that a Muslim's Islam does not vanish due to doubt.