Avengers: Infinity War - Why Every Victim Was ACTUALLY Chosen To Die
2. Peter Parker
How He Died
Snapped out of existence by Thanos, horrifically slowly after sensing his death coming thanks to his Spidey Sense.
WHY He Died
Peter Parker's death was chiefly aimed at teaching the audience a stern, devastating lesson about nobody being safe from Thanos' kill frenzy. He is the paragon of innocence in the MCU and he's just a kid, which is precisely why Tony Stark was so reluctant to allow him to join in the fight against Thanos in the first place.
And even more crucially, Peter's death serves a dramatic purpose with Stark. The two have developed a relationship akin to father and son so far in the MCU and Tony already harbours some feelings of regret about bringing Parker into the Avengers picture because of the threat to his wellbeing. To then have that come to a climax where Tony literallt watches Parker fade away in his arms as he appeals to him to help is just dramatic poetry.