WOW what are you smoking? Putin has no desire to destroy ISIS, he will blame the U.S. for ISIS as he plots his way to his true goals:
#1 Destroy the rebel uprising for Assad.
#2 Partner with Syria, Iran, Iraq to bring about a Shiite dominated Middle East State
#3 Use this power, influence and money gained from this domination to rebuild the Soviet States.
#4 Destroy the USA and Israel.
#3 isn’t enough for the #4. Russia is far away from anything like destroying the USA and I see no reason why Russia would want to destroy Israel. It’s influence and leadership what is at stake. If Russia succeeds in Syria - and the success is when peaceful life has been restored there, it’ll gain in terms of influence and leadership, while the USA will loose, because the other countries will think that the USA will have tried and failed.