Is it permissible and in accordance with the methodology of the Pious Predecessors for a man to discuss Salafism with women, especially if this person declares himself to be single, shows interest only in women, and displays pictures of himself with women at his workplace, particularly if he also posts a link to the "IslamQA" website on his account?

It is forbidden to display images of women, even if only the face is visible, because it is considered 'awrah (nakedness) according to the most preponderant opinion, and it is the most significant source of temptation in a woman. It is not permissible to intentionally look at these images. As for women participating with non-mahram men in public discussion forums, it is permissible if there is a need, provided that Islamic guidelines are adhered to and limited to the extent of that need. However, it is not permissible if it involves a soft speech, suspicion, or temptation. The deviant actions of some Muslims are not an argument against the religion.