If the USA and USSR didn't end up coming to blows that was their decision. This is a different situation. The fact is Iran is playing with fire by using proxies to strike at Israel and I'm not aware of any requirement for Israel to sit back and wear it. The decision to strike back at Iran will be made on a cost benefit analysis...and not on what happened between the USA and the USSR.
5 wounded Syrians rushed to northern Israeli hospital (Haaretz)
from the article: Israel attack wouldn't stop Iran nuclear program, says U.K. study