I think a raise is only good if 1) You have a decent chance of having the best hand. 2) You have a good chance of folding out a lot of other hands that could outdraw you. In your original hand, a raise might be ok if MP1 is a LAG and might bet without a K, and you might get everyone else to fold their overcards. Probably too many people in the pot to hope for that. I think that if there were callers betweeen you and the original bettor, a raise becomes even worse, b/c someone likely has a king, and even if they don't someone is more likely to out draw you.