Bad tactic. If Obama is serious about countering the ISIS, then he should give high grade advanced weaponry to the Kurdish Peshmerga troops who are fighting the ISIS in Northern Iraq.
I also think that airstrikes will not be enough to stop ISIS.
Giving high grade advanced weaponry not just to Kurds but also regular Iraq army is the only way (and the best strategy) to stop terrorist in Iraq.
A lot of the equipment ISIS has (tanks, weapons, etc), they managed to take from Iraqi army members who fled their positions. Where did Iraq originally get that equipment? Oh right, us.
If you look at Americas history, you'll learn we have a poor track record of shit coming back to bite us years later when we arm a foreign group.