Many foreign policy experts on both the right and the left of the political spectrum have stated that it is our mistakes abroad that do more to damage our foreign policy than anything else.
A hasty withdrawal would only damage us more. Withdrawing would, first of all, signify that we no longer have the capabilities to fulfill our commitments, which damages our credibility with our allies. But more importantly, we show that we will only help people for so long. Nothing could be more harmful to us long term than to tell people that our support isn’t everlasting, especially when the situation is improving.
I agree that we should be selective about where we get involved. But once we’re in, we’re in. We cannot withdraw from something once we’ve committed. That is what’s dangerous.