Do you know just how stupid it sounds when you say 'illegally steal'?
Yeah, I'd like to see you kill a person with a house. As with any property: If you threaten to hurt others, by whatever means, then yes. It should be taken away. Also, these so called Reichsbürger deny to accept the BRD as an authority, so they are not entitled to anything by our laws. If they don't want to be a part of the BRD, fine. Their choice. GTFO. I'd say to them the same thing I'd say to refugees. If you want to stay, play by the rules. If not, fuck off.
You do relaize you're talking to the people who have Donald Trump running for president, and his opponent is someone who can barely hold her ground against him, right? Merkel's a disaster, but this Trumplery election is a whole different level of fucked up.