The existential horror of suicide bombing is implicit in the nihilism of the bomber, an individual who believes their only value to society is as a personification of military technology. The show doesn’t explore this at all. The character doesn’t have any character. He’s just a throw-away threat used to explain another Supe’s disfigurement.

They got away with it because it has similarities with what happened in the past

Naqib is a lazy caricature of a Syrian guerrilla fighter. He gets something like two lines, then gets decapitated. The writers got away with it because lazy caricatures of Arabs in action media are the standard for western media.

Compare him to Ted Sprague in the TV Show “Heroes”, a guy with a legit story arc, a tragic backstory, multiple confrontations with the protagonists, and an ongoing beef with “The Company” (the Vought counterpart in the Heroes setting) that drives the plot forward.

Of course Sprague is a mash up of Ted Kaczynski and Timmothy McVey rather than Cliche Arab. So I guess he deserves a bit more respect.