Jesus still has to teach them about commitment. The first lesson is tolerance. It is very common that first fervour is accompanied by intolerance of other peoples opinions. This is seen in the lives of James and John. Their response to rejection was violence.
“Lord do you want us to burn them up?”. They were rebuked by Jesus.
Jesus calls and moves on. In this Gospel we see Jesus call one and get a No, call another and get a maybe and call another and get a Yes…but. The answer does not delay Jesus in his mission. He goes resolutely on to another village.