Serpents are quiet, cunning, quick to act when a threat is imminent. A serpent bought a curse on mankind (Genesis 3) and we now meet a “serpent” who boldly and decisively saved his people from those who would deceive them to destruction. Later, Eliyahu (Elijah) also learned that God’s preferred way to communicate with His people is not through thunder and lightning but a “still small voice.”
The Torah reading פינחס Pinchas (“Phinehas,” Numbers 25:10–29:40) starts with the culmination of the events in the prior portion (parashah). The culmination of Israel “playing the harlot” with idolatry ended when Pinchas (Phineas), Aaron’s grandson, speared a Shimonite chieftain and a Midianite chieftain’s daughter through with a spear. Both of them were mentioned by name so they were both people of reputation.
This event was so significant, it’s even spoken about in the book of Revelation (Jude 1:11; Revelation 2:14). We can miss the why if we don’t understand the why of the original event.