It's illegal to forcefully take money from people unless you're the government. It's illegal to take someone's liberty, unless you're the government. It's illegal to kill someone, unless you're the government. Private organizations can do everything that government can do except for legally break the law.
Either ‘the group’ is superior or the individual is superior. Marxism, socialism, fascism, and pure democracy are all forms that give power to ‘the group’ and then use violence to force individuals to obey the dictates of ‘the group’. The concept of liberty is one in which the individual - in the exercise of his unalienable rights - is superior to every and all powers. That is what the Founders intended. That is what we are supposed to have under the ‘contracts’ of the Declaration of Independence and the state and federal constitutions. That is what I am entitled to as an American. That is what I insist upon. And that is what I will kill for.