Jesus' righteous indignation-Gospel of John

Christ expresses his righteous anger over the careless treatment of the temple by marketers, who were selling sacrificial animals at the outermost part of the temple. They use such place to exploit incoming buyers and worshippers of the God of Israel, prompting Christ Jesus to call them "den of thieves." Why can we learn about Christ's zeal for a place of worship? (John 2:13)