This is interesting. What caused the BLM mob to arrive at his house was that they were searching for houses with Trump signs and then, once found, they were posting the address on their YouTube channels, telling the mobs to arrive there that night to harass the home's occupants. That's why the mob was there. There's a YouTube of the BLM member showing the house, announcing the address, and instructing BLM to riot there that night.

So, the message is clear, White folks. If you have a Trump sign, be ready for a BLM mob to surround your house and shout threats at you, and don't go get your gun, because the cops will come and arrest you for being ready to defend your home.

This guy discusses it in detail. Skip to 10:30 to see the doxing video:

Link to video.