Is it obligatory to condemn the one who exposes his thigh and the one who hangs photographic images, or is it not obligatory to condemn them because these are two matters of scholarly dispute?

It is not obligatory to condemn matters of ijtihad (independent reasoning) and valid disagreement, such as the issue of uncovering the thigh or the ruling on photographic images. Rather, what is obligatory in such matters is offering advice, guidance, and explaining the most preponderant opinion to those for whom it becomes clear.