Why does Gus tell Walt ahead of time all his plans , seems pretty dumb for someone so strategic and cunning.

Why on earth would Gus tell Walt he’s planning to kill Hank ? And then threatens to kill Walt’s entire family if he interferes , seems like such a stupid thing to do considering that’s literally all walt has. His family. Gus clearly uses this as a threat cause he knows how much Walt’s family means to him. All it did was Walt snitching to the DEA that a hit is out on Hank which ended up with him being under heavy security with a ton of guards and police. With hanks connections he could have gotten his whole family (Walt’s family ) in witness protection even ? While Hank continued to investigate Gus Why didn’t he just kill Hank when he was walking around very easy to kill, Gus just made things so much harder for himself. He knows Walt isn’t the type to sit back and let him do whatever he wanted, as evidenced by Walt killing gale and the two street dealers. He had to have known Walt would interfere Was Gus simply just too overconfident thinking even if Walt tries to protect his family and Hank walt still wouldn’t be able to touch/kill Gus (with all the security he has) so he’d just wait and kill Hank since he has the upper hand