There is no feature to not kill on kick.
I have an anti-hack plugin that kicks for use of hacks but it also considers that as a combat-log,
can this be added?

Set Kill on Logout: true to false?

Oh sorry didn't see the response, no I want them to be kill for combat logging, but I have multiple other plugins that kick for various reasons and kicking a player should not kill them.

So you're issue should be solved with the setting mentioned above?

False. if I change the setting above people can logout during combat and nothing would happen to them.