(5) and every first-born in the land of Egypt shall die, from the first-born of Pharaoh who sits on his throne to the first-born of the slave girl who is behind the millstones; and all the first-born of the cattle.
Why would God punish the people who aren't responsible? (Kushyia)
(5) מבכור פרעה עד בכור השפחה FROM THE FIRSTBORN OF PHARAOH UNTO THE FIRSTBORN OF THE HANDMAID — All who were of less importance than the firstborn of Pharaoh and of more importance than the firstborn of the handmaid are included in this description. And why were the sons of the handmaids stricken? Because they, too, treated them (the Israelites) as slaves and rejoiced at their misery (Midrash Tanchuma, Bo 7).
Are Nazi supporters as bad as the Nazis? Should they have been tried and punished like the Nazis for their actions? Israeli Government bulldozing the houses of terrorists' families' houses?
מבכור פרעה עד בכור השפחה מן הנכבד מכלם עד הנקלה מכלם, אבל מבכור פרעה עד בכור השבי הוא מן היותר חוטא בזה עד החוטא פחות מכלם:
Sforno on Exodus 11:5
מבכור פרעה עד בכור השפחה, from the highest layer of Egyptian society to the most lowly. When we read a similar line in 12,19 the meaning is “from the most severe sinner to the relatively least guilty sinner.”
Does the degree of the crime you commit change the punishment that you will get? If a murderer gets a longer sentence than a thief, how come God punished all of the Egyptians equally?