Did Biden give a green light for Israel to attack Iran?

That seems to be the talk of the day.

STEPHANOPOULOS: But just to be clear here, if the Israelis decide Iran is an existential threat, they have to take out the nuclear program, militarily the United States will not stand in the way?

BIDEN: Look, we cannot dictate to another sovereign nation what they can and cannot do when they make a determination, if they make a determination that they're existentially threatened and their survival is threatened by another country.

Read the entire post I link to above. I'm not entirely sure that Biden was giving Israel a green light to blow up Iran. It could have just as easily been Biden being very careful to not criticize anything Israel may or may not do, since Israel is a hot-button issue in our country and the world. What do you think? Was Biden signaling that we're okay if Israel attacks Iran (are we?), was Biden just trying to avoid taking a stand either way, or was Biden just being Biden and not speaking as carefully as he should?