"Palestinian militant stands above the gate of the European Union (EU) commission's headquarters in Gaza City. "
OK. Here is someone who is in a Jew-free Gaza, where the elected government supports terror explicitly. There is no fear that anyone will shoot him or arrest him. His leaders support his cause.
Why does he still need to cover his face?
The answer is as obvious as it is disturbing: He does not know any other way to act. He grew up idolizing murderers who hide among civilians, who target women and children. Terror is his life and nothing can change that.