John 7:43 KJV
So there was a division among the people because of him.
In the previous chapter the multitude forsook the Lord because of His hard sayings. This chapter begins with even His brethren not believing.
As the chapter progresses however, the people begin to struggle with faith. They are now listening to the message and they are being honest with it and their own position in it.
• Those who did not believe came out.
• Those that did believe made it public.
True faith has to get passed emotions or mere desire and honestly look at the heart. We either believe or we do not, we can't halt between two opinions. The hard sayings of chapter six led to a good hard look at themselves. And that led to an obvious division between those who were true believers and those who were not.