The U.S. plans to withdraw 5,000 troops from Germany amidst rising tensions with Iran.
Trump's confrontational stance on Iran complicates U.S.-European relations significantly.
Experts warn that reduced troop levels could embolden Iran in the region.
The future of NATO may be jeopardized by unilateral U.S. decisions.
The evolving situation underscores the need for a coherent U.S. foreign policy.