When Jesus says that a kingdom divided against itself cannot stand, I believe Jesus meant two things:
First, that you cannot become great if you oppose the greatness of others, and also: that you cannot be a worship if you oppose the right of others to worship your God in the same way that you.
When Jesus says a house divided and against itself cannot stand, I believe Jesus was saying that you cannot have a positive and lasting connection with your house of worship if you oppose the rights of others to have positive and lasting connections with their house of worship.
I believe God is also saying you cannot be included by the religious community or the fellowship of God lovers if you oppose the inclusion and mutual support of others in the religious community and fellowship of God lovers.
When Jesus said a city divided and against itself cannot stand, I believe Jesus is saying you cannot attain wisdom if you oppose the rights of others to attain the same wisdom that you have and you cannot gain popularity if you oppose the popularity of others and the same with respect or fame or praise or status, if you do not let others bathe in their glow, you will not be allowed to bathe in your own glow.