The US can keep doing that and add its voice to the chorus of most of the world backing Israel into a corner. But in the end, when it does reach here, not only is the US going to be unprepared (due to the fact political correctness prevents it from really defending the borders, and the fact the population is illinformed by the government about what to do to prevent terror and act during it), not only will it use MUCH greater force against the terrorists afterwards, but it will be sorry it did not support going after the perpetrators in the first place (and in addition to supporting going after the militant Islamic ideology, which the US refuses to publicly declare as a target, due to political correctness).
Could it be that it doesn't want a remake of the 1970s oil crisis which hurt the US economy? Maybe. But the US needs to look at it in both short and long terms. In the short term, sure oil prices will go up, but in the long term a greater threat will be removed, a threat no longer making money off our purchasing of oil that occurs today.
You've probably heard this a million times, "Today the Saturday People, Tommorow the Sunday People"