Why did he care? Good question; one that had become a recurring theme. Not so long ago he would have said he didn't and meant it. Not so long ago, they'd met up for drinks and casual sex - nothing more, nothing less. Easy.
But then Ares had gone and managed to squeezed himself into National Securities ordered life. And not in a subtle way, either. Straight lines got broken up and were forced to rearrange themselves to accommodate a being that was anything but orderly. Easy changed its meaning.
It made sense, though, didn't it, that a war god even though it was an ancient one, had succeeded in crashing through Jamie's carefully arranged lines of defences? Everyone who could claim to be somewhat close to him was of a destructive nature.