The high priest and Jewish leaders were riled up against Stephen - God's good and faithful witness to the truth of Jesus Christ. It did not accomplish the good things God desires. When we get riled up, we need to keep in mind that God's will is done in people's hearts. God's kindness leads to repentance. We don't scare people into belief in Jesus. God's power is made perfect in weakness. When we are weak, we are strong.
I'm going to try to be riled up in grace, truth, love, and faith. How about you? Let's see how God uses that!