The left is also providing some credible reports that Kirk was wavering on Israel. It's not entirely unimaginable that Kirk was wavering on Israel. Lots of people are, who used to give them full-throated support.
Not certain that people are wavering on Israel so much as relinquishing their earlier support of Netanyahu and his governing coalition in dealing with the Palestinian question in Gaza and the West Bank.
The people who believe Israel had a role aren’t going to be persuaded by Bibi denying it. All this does is plant the idea in people’s heads who otherwise might not follow the fringes of magastan.