The leaving head of the Israeli mossad recently had an interview where he surprisingly frnakly admitted responsibility of Israel for several "incidents" in and coups against Iran.
After that you see Israel taking out that ship as a perfectly valid and realistic scenario.
In the end it does not matter what where sinks - as long as it is Iranian and sinks I am fine with it.
They do not have many supply assets like this. A loss of their biggest such asset seriously is a handicap for their navy's operational ambition.