Bibi is in a delicate spot, as it would be potentially bad for Israel to make support-for-Israel a GOP-only phenomnia — but I am not sure the charade of Dhim support for Israel is worth it.
And, I do think frank talk about Obama from Bibi might be listened to.
If Israel launches a strike against Iran, Netanyahu MUST speak out publicly against Obama. He cannot allow Obama to posture and get reelected as some kind of ally to Israel when he's been their enemy all this time.