It's possible he has a different belief on altar calls, but, that doesn't make him wrong. There is no scriptural directive to give such a call. It's a man-made, man-imposed choice. So, why is it "sad" that this is how the church, or at least this pastor has decided to lead?
I would say you should stay unless the Lord leads you to leave. This is not a doctrinal or moral issue. You must decide "which hill to die on." I would hope that this wouldn't be it.