One of the defining characteristics of a functioning state (what you might call civilization) is a monopoly on violence. Conversely, the existence of unsanctioned militias (e.g. cartel gunmen in Central America) indicates a failing or failed state.

What you think of as your 'liberty' is in fact a construction of the state provided to you (not by you) - your playpen if you will. If the state fails, your playpen will collapse, and perhaps only death would save you from the horrors thus unleashed.

This is less about liberty and more about starting a full blown civil war. Do you think minority groups will be allowed to form militias if these guys had their way?