'Cast Out Demons' in the Bible

So if Satan too is divided against himself, how will his kingdom stand? I ask you this because you claim that I cast out demons by Beelzebul.

Now if I cast out demons by Beelzebul, by whom do your sons cast them out? Therefore they will be your judges.

But if I cast out demons by the finger of God, then the kingdom of God has already overtaken you.