Luke 11:14-32 "Stand Firm"

And if Jesus was doing this because He was…or had a demon…than He would be casting out other demons…
And if the purpose of demons is to possesses people…and cause harm…isn’t that going against the kingdom of Satan?
How could his kingdom possibly stand if demons were acting in a way that would be counter intuitive to the plan of Satan?
Satan’s kingdom would be divided, weakened, and would fall like any other institution where there was division.
How can a family stand together…unified as one…if someone in the family is causing division?
How can a church stand together…unified as one…if someone in the church is causing division?
How can a company stand together…unified as one…if someone in the company is causing division?
And how can a nation stand together…unified as one…if there is division among the people of that nation?