Why? If there is no law there is no government.
That's what local police are for. The moment you talk about tanks and fighter jets, you are talking about the military. When the state uses the military against its own people, it is bound to betray its covenant with the commonwealth. The idea of freedom and liberty is safeguarded by that covenant, that the judiciary, military and government work for the people and not against them.
Im surprised you havent learned that in school seeing as your government excels at destabilizing whole nations. See Libya before and after al-Qaddafi. Who wanted him dead. Who killed him, what became of his country and who is mediating the current filth that is the once proud state of Libya.
You are not allowed to get the squatters or and it can take years to go through courts to have them evinced.
It is enough that they stay in your house for 48 hours and they are protected by the law.
This is in France. A stable democratic country which puts squatters rights above the ones of owners.
Toothbrush becomes a lot less of a panacea, then.
What I means that there is a difference between a burglary where you are at home and defend yourself and your family (and accessorily - your belongings) -- and the case when you come back from vacation and find someone installed in your house for a few days.
Bad government may be worse than no government at all.