What emotion did Othello go through before killing Desdemona?

Othello thinks he is the dreaded "cuckold" (husband whose wife cheats on him). His resolve is to kill Desdemona but emotionally, he still loves her. Here the two parts of othello collide. Othello takes Desdemona's cries for mercy, and her remorse at Cassio's misfortune, as proof of her indiscretion; although his rage is tempered, he is still set on having her dead.

He is angry and hard hearted and fast tempered can’t hold patients when she find casinos handkerchief thinks she is cheating on him.