Whoever boycotts the secretary of state - whether it's the Kurdish parties, whether it's the Sunni parties or whether it's a Shia parties - gets rewarded by a reassessment of strategy and usually a moderation of the U.S. position.
Were the administration able to understand the basic fact that some countries simply cannot abide by America, it would realize that the Iranian-Venezuelan military alliance itself is cause for a systematic reassessment of the rationale behind the US's Western Hemispheric strategy.