This German expert geopolitical analyst offer his broader view on why Trump decided to withdraw US troops from bases in eastern Syria in spite of neoconservative opposition.
Trump knows that the United States' 'unilateral moment' after the demise of the Soviet Union, which left the U.S. was the sole superpower, is over. Russia is back and China is rising. Trump's policy to adopt [adapt?] to the decreasing U.S. power is to end the 'globalization' that allowed for China's rapid rise. He wants to geopolitical[ly] split this world into two influence spheres. These will be separate from each other in the political, economic, technological and military realms. [my insertions]
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Trump decided that to prevent Turkey from leaving NATO, and from joining a deeper alliance with Russia, China and Iran, was more important than to further fool around at the margins of the Middle East. It is the right decision.