Final answer:
U.S. involvement in the Middle East, particularly in Iraq and Syria, during President Obama's second term led to violence in the United States due to the rise of extremist groups such as ISIS and increased anti-American sentiments.
Step-by-step explanation:
U.S. involvement in the Middle East during President Obama's second term led to violence in the United States due to various reasons. One major factor was the rise of extremist groups such as ISIS, which grew as a result of the power vacuum left by the U.S. intervention in Iraq and Syria.
These groups carried out attacks both in the Middle East and abroad, including in the United States. Additionally, the controversial drone strikes conducted by the U.S. in the Middle East increased anti-American sentiments, which in turn fueled violence in the United States.