One reason Simon is called "the Zealot" is to distinguish him from the Apostle Simon Peter. -- He was againts the Roman oppression.
Twelve Apostles, Full Of Zeal, Serious Minded, Simon The Zealot
Three more marks of a truly repentant person
1.Longing to see others do right
2.Zeal to see God glorified
3.Vengeance – desire to see the guilty punished
2 Corinthians 7:8-11
Godly Sorrow, Full Of Zeal