Communism is the belief in the creation of a society free of the state, of all hierarchies, and of property.
Basically, a society where everyone is free to do as they like, everything is communally owned, and everyone has an equal relationship with everyone else.
The way to achieve this, according to communists, is to have a global totalitarian government that represents the will of the people, and which takes ownership over everything (all property is borrowed from the government, who maintains ownership of it, and all businesses are run by government), destroys all relationships and communities (including such relationships as those between parents and their children, and such communities as local religious ones), and which kills off the older generations as well as deletes or re-writes all history, so that the newer ones grow up never knowing the concepts of ownership and relationships.
They call this step "socialism", and it must take over the entirety of the planet to work, because the mere knowledge of the existence of any other ideology is an existential threat to socialism.
Once the perfect generation has been born, one which is fully impartial to all others, and which never knows of property. Then the state can dissolve itself and the world enters an era of global communism.
This is the promise, anyway, in reality the puppet rulers of the Jews will be left in charge of a world of slaves forever, with the Jews being the only people left with their own property and relationships (the Jewish community shall never be broken up, the Jewish race shall never be diluted) and an absolute control over the men on the throne (it is the Jewish way to rule from behind the throne, rather than from upon it).
Everyone else is a slave, dependent upon the good graces of the state, trampling over each other for better favor from the government, because nobody knows one another and everybody hates each other.
Property is gone, everything is owned by the state and you are permitted to use it for the singular use they've given permission for, this is your "personal property", use it for anything you have not be authorized to use it for, or allow others to possess/use it, and it gets taken from you/them and you/they get punished for stealing from the people (as represented by the state), often severely.
All sense of belonging to anything smaller than "the people of the world" is gone, sex occurs without love or intimacy between partners, children are taken from their parents to be raised by the state and are moved about to prevent the formation of friendships, as an adult, work and pleasure consumes your life, you are still moved around to prevent any bonds being formed, sex will occur as a matter of pleasure, and race-mixing will be strongly encouraged, there is no community beyond the global one, and no concerns beyond the personal ones.
Your every action will be monitored and manipulated, even calling the state the state is forbidden, it will only be referred to as something else, all those who helped create this world with their false rebellion, and who then genuinely rebelled against what they had created, will be destroyed by it.
People will cheer their passing, and they will be silently remembered as the ones who doomed the world, then forgotten completely within two short generations.
It will not be anything like you'd seen in "1984" or "Brave New World", but instead it could be said to have aspects of both, there will be open conflict, but it will be created conflict to distract people, almost no one will express thought beyond the acceptable boundaries, the minds of the public will change regularly, and most of the time they will be drowned out in trivial hedonistic distractions and a focus on the personal and immediate, those who do openly express ideas that threaten the system will be shut down with shame and guilt, for most this public embarrassment and disapproval will be enough, but for those who persist, they will be punished harshly, and everyone will be made to regard them as violent extremists worthy only of hatred and hostility.
All media will be propaganda, all environments and pleasures will be filled with reminders of state's narratives, so there will be no escape from the prevailing beliefs of the day, nothing you can do to deal with all this except numb yourself to it, and give in to utter apathy and mindless compliance with a society you despise.
Everyone will hate this society, but none will show it, they will know they are lied to, but none will issue challenge, and you will be ever aware that anyone can turn against you at any time.
All potential sources of resistance will be infiltrated, co-opted by the state, and herded into a direction that no longer poses any meaningful threat, there will be democracy, but the state will count the votes, and ensure that their preferred leadership will come out as the victor, they will cheat and do this openly, knowing it takes a mere denial and shaming of those who disbelieve to ensure their candidate's leadership is unchallenged.
There is only one thing they fear, and that is violence, a regular set of violent revolt would be the one thing that could destabilize their domination, however, this is terrorism, and so it will never occur, especially given that their opposition falls into at least one of three categories, none of which are a threat to the establishment and all of which are indeed by some measure useful to it: Conservatives, Christians, and Patriots.