Answer:
No, the US should not continue to work as a "global police officer" because other countries can solve their problems alone, and being a global police officer can make the US a target for other countries. If the US decides to help one country with their problem other countries will expect the US to come to their aid when they get into a difficult situation too. Also, if a decision the US makes while being a global police officer upsets another country the next time there is a conflict they might target the US because of that incident. The US should focus on the events that are happening in their own country than in others.