What is the ruling regarding blasphemous words when the speaker's intent – whether they intended disparagement or not – is unknown, and is the questioner's action of pronouncing the Shahada and performing ghusl as a precaution correct, or is it an act of extremism, after the speaker said: "Our Lord, عز وجل, did not send down the Messenger, peace be upon him, for us to display him on walls," while smiling?

Words that could bear a meaning of disbelief (kufr) and another meaning are not considered to render their speaker a disbeliever unless their intention for the meaning of disbelief becomes clear. "If there are ninety-nine reasons indicating the disbelief of a Muslim and one reason for him to remain in Islam, then the Mufti and the judge should act upon that one reason." As for words that are explicit in disbelief, the original ruling is that their speaker is a disbeliever, except in cases of duress or ignorance. The aforementioned statement does not necessarily imply derogation. As long as you are not certain that your intention was derogation, the original ruling of remaining Muslim stands. There is no need to pronounce the Shahada or perform ghusl. We advise you not to indulge in obsessive thoughts (waswas).