A couple of little theories!

[abergoat]

No: HPFGUIDX 162291


zanooda wrote:

> As for "revulsion and hatred", it's possible that these feelings are 
> not intended for DD, but for Snape himself, that's how Harry felt 
> when he had to force-feed DD that green potion in the cave, it's 
> described in practically the same words in both cases. 

Abergoat offers:

Or perhaps Snape's hatred was directed at Harry him he was seeing pour
potion down Dumbledore's throat via Legilimens? Harry sealed Snape's
fate in that moment...but Snape hated Harry for that.

Abergoat