[Goater]

My personal opinion is that this was an all Israeli or all American operation. There is no need for the two countries to conduct such a limited mission together, unneccesarily complicating the sortie (if both have the necessary capabilities).

I think its most likely to be Israel, with the leaks designed to present a clear picture - that Israel has the US's full support for limited operations against such sites (unconventional/nuclear weapons).

I dont think its possible for Israel to have acted unilaterally, "trying to drag the US in" - no way Israel performs this mission (other than at a time of out and out war) without US permission.