David in Gath

1 Samuel 27:1-4 - But David thought to himself, "One of these days I will be destroyed by the hand of Saul. The best thing I can do is to escape to the land of the Philistines. Then Saul will give up searching for me anywhere in Israel, and I will slip out of his hand."

So David and the six hundred men with him left and went over to Achish son of Maoch king of Gath. David and his men settled in Gath with Achish. Each man had his family with him, and David had his two wives: Ahinoam of Jezreel and Abigail of Carmel, the widow of Nabal. When Saul was told that David had fled to Gath, he no longer searched for him.

I wonder why Achish didn't have a problem with accepting David and 600 (mostly) Israelite men into his territory. Was it really enough just to be Saul's enemy? That is, anyone who's an enemy of Saul is a friend of mine? Doesn't seem like a particularly smart move on Achish's part.

I'm curious. Could you please tell me what brought you to this page by mentioning it in a comment? I won't publish the comment, if you ask me not to.