It just makes me dislike Batman if he actually feels he's got any sort of connection to the Joker, to the point his life is affected by his death. So much that he trips up when he faces Harley.
Batman obviously tries to deny and bury his feelings towards the Joker with claims of hatred.
But no matter much of that is he does, it's there - the weird affinity.
Look at TKJ. Batman pitied him and worried that they might end up killing one another. He reached out to his enemy for a chance at redemption. But Joker knew he couldn't ignore and forget the evil he's committed...The guilt of facing a normal life after everything was too much for him.
Then in another storyline, he did just that after Batman went missing. He attempted to live normally. ..then Batman returned and so did the Clown Prince of Crime.
Joker exists only through Batman.
And Batman doesn't need Joker to exist. But he is a constant reminder and stirrer of emotions to Batman. He whispers in his ear things that shake Batman deep down. ..Things that obviously he will not let show on the surface, but Joker knows he gets under his skin...and Batman knows this too.
As much as Batman hates Joker, he's more connected because he is his greatest threat. The likes he could never have imagined...something that terrifies him even. Joker is a threat to everything Batman holds dear...and I feel on a level, that Batman needs and wants him around. Strange as it sounds. The two are the opposites of the same coin.
Joker makes this connection more obvious by spelling it out, whereas Batman makes it seem less by claims of hated in order to hide the truth from the Joker and himself.
That's what I think anyway
