Is the saying, "Whoever errs publicly, we respond to him publicly," correct, and is it permissible to publicly mock the wicked or those who transgress against the religion, under the pretext of "the recompense of an evil is an evil like it" and "Allah does not like the public mention of evil, except by one who has been wronged"?

Error is inherent to all, and advice is among the virtues of Islam, its foundation being gentleness and concealment, except for those who openly commit sin or innovation, persist in it, and call others to it. It is permissible to mock the statements of innovators and those who openly commit sin, and those who speak about religion, provided that the mockery is not directed at their physical appearance, and that it is within the bounds of seriousness and truth, and not made into a habit. As for those who mock Islam, its rituals, and its adherents, it is permissible to treat them in kind, but it is better to refrain from that and suffice with sound scholarly responses.