Right. You're trying to play this game where "Jehovah don't play", implying that he's not someone to mess with, while talking out of the other side of your mouth by saying "God didn't kill them! It was the angel of death".
So, since we both are able to read, we both know who the "I" is in this verse talking about the Passover, maybe stop doing your Into the Night impression with the dumb word games.
On that same night I will pass through Egypt and strike down every firstborn of both people and animals, and I will bring judgment on all the gods of Egypt. I am the Lord.