Earlier quoted context omitted.
Not at all the same in Germany, but even as a property owner, I see some justification for effectively legalizing squatting in unused buildings. It would create some incentive for property owners to invest and rent out buildings, or otherwise sell them cheaply. Ideally this would be formalized and matched with a proper framework, i.e. municipalities can easily buy unused properties at a nominal cost, property owners…
> It would create some incentive for property owners to invest and rent out buildings, or otherwise sell them cheaply. Property is property, you should be free to do what you want with them. Otherwise it's not property. It's like saying "you have a car, you need to use it everyday, otherwise we can justify people borrowing your car when they need one". Also, rent controls, aren't they a thing in some parts of Germany…
Property laws aren't law of physics. The natural state is, you own what you can keep. If I come to you, and bash your head in, and take your all possessions - well, it's mine now, as you weren't able to keep any of it (or your life).
A rule-based society is what lets you cry foul when someone "infringes" on your "property rights", and for that to mean anything. A civilization is what lets you forget, day to day, that all the deeds and leases and contracts are just thin abstractions, mutual self-delusions keeping the knives sheathed and the guns holstered. But we're not a post-scarcity civilization yet.
Happy society giveth, an unhappy society taketh away. If you're at the point that over half of your society is worried about keeping roof over their heads, a substantial chunk of it haven't one, and a noticeable part of that group is happy to break in to temporary empty housing - don't turn your back on your society, lest property again stops meaning anything, and your own life may be forfeit too.