So Trump decided the US military should step aside and permit Turkey to:
1) invade a sovereign country in violation of international law
2) ethnic cleanse a large strip of Syrian territory (the plan is to run the Kurds out of their homes and villages and replace them with Sunni-Syrian refugees now in Turkey) -- This is a war crime
3) attack and kill a loyal US allies who helped defeat ISIS,
The Kurds are also secular Muslims of the type the US should support.
(ironically so is Assad, and so was Saddam . . .)
And of course this invasion gives Erdogan and Turkey more say and power in Syria.
Not even to get into Trump's personal financial interest in keeping Erdogan happy.
Edit: Somehow I agree with awful and corrupt Netanyahu on this:
Israeli Prime Minister Benjamin Netanyahu is condemning the Turkish invasion of Kurdish areas in Syria and warning of an “ethnic cleansing” against them.
Netanyahu says Thursday that Israel is prepared to extend humanitarian assistance to the “gallant Kurdish people.”