in the event of a civil war all the 'regular citizens' who will still have anything at all will be robbed at gunpoint by local gangs and all those gangs then will be wrecking havoc non stop for a decade.
yugoslavia went through that, russia went thorough that, i grew up through that. you do not want that.
and any old fart here envisioning holding defense of his castle against hordes of young hungry criminals is a moron. they will smack your house with RPGs, if you shoot at them, then will come to collect what is left of you and your prized guns and other possessions.
so, no, civil war will not be that simple.
and politicians, somehow, typically do survive all that just fine, as the whole horde of military and government services will be protecting them. and regular people get too busy hiding and protecting themselves rather than shooting at them.