Let's dissect Iran:

Escalation Risk: The conflict could spiral into a broader regional war, involving allies like Saudi Arabia, Turkey, or even Russia and China, who have ties with Iran. This could destabilize the Middle East further, disrupting global energy markets and trade routes.

Economic Impact: Iran is a major oil producer, and conflict could spike oil prices, hitting the U.S. economy with higher fuel costs and inflation. Sanctions or blockades could also disrupt global supply chains.

Military Overstretch: U.S. involvement would strain military resources, already spread thin by commitments elsewhere (e.g., Ukraine, Indo-Pacific). A prolonged conflict could lead to significant casualties and financial costs, with estimates of past Middle East wars costing trillions.

Domestic Political Division: Intervention could deepen U.S. internal polarization, with public opinion split on foreign wars. Recent polls (e.g., Pew Research, 2023) show growing wariness of overseas military engagements.

Terrorism Threat: Involvement could provoke Iran-backed groups like Hezbollah to target U.S. interests or allies, increasing terrorism risks at home and abroad.

Diplomatic Fallout: Aligning too closely with Israel could alienate other regional partners and complicate relations with countries like Qatar or Turkey, who maintain ties with Iran. It could also undermine efforts to re-engage diplomatically with Iran on nuclear issues.

Non-intervention avoids these risks, preserves strategic flexibility, and allows focus on domestic priorities and other global challenges.