This part sounds kinda not very nice:

16 “You are not to leave even one person alive in the cities of these nations that the Lord your God is about to give you as an inheritance. 17 You must completely destroy the Hittites, the Amorites, the Canaanites, the Perizzites, the Hivites, and the Jebusites, just as the Lord your God commanded you,".

Deuteronomy 20:16-18

Joshua 6 is basically:

God: here's how to overthrow your enemy.

Josh: cool! oh, I'm just gonna kill everyone and everything in the town - man, woman, child, cow, grass - and burn it all down for fun because I hate these fuckers.

God: just don't bring that foreign bitch.