Hopefully it will never come to that. The chareidi gedolim are all opposed to killing Jews, even if they are non-religious and/or zionists. It would take an extreme provocation (banning bris milah, closing down yeshivos, perhaps conscription of boys and girls) to cause the hareidim to follow the route of the Hasmoneaim and go to war against the modern day Misyavanim (who currently run the government in Eretz Yisrael).
Another factor is that after the Misyavanim (in control of the government in Eretz Yisrael) lost, they were able to call in the local Greek army from Syria. The zionists have no outside help they can count on as most of the world considers them to be criminals. Indeed, if the haredim were willing and able to take up arms against the zionists, it would be the frum insurgents who most likely could find outside allies from the many countries at war with the zionists.
While in an Israel in which Lapid was Prime Minister and Avidgdor Lieberman was the principle opposition, it could create a situation in which instead of throwing dirty diaper or lighting trash can the hareidim would be forced to armed rebellion – that is an unlikely scenario.