No, we should not do this. We have 3200 troops, special forces in Syria, check the details.
These Gulf countries want someone to fall back on if things go to hell.
Also, we'd be dealing with things like Renegade soldiers from these troops shooting at us, trying to kill, suicide bomb us or things like that.
We lost 250 Marines in Beirut due to a suicide attack back in about '83.
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And the article couches it in terms, we should fight for land that ISIS lost and that the Shiites are going to control. Hell. Fighting for land that ISIS lost, Sunni land, maybe they deserve it but it's not for us to make it right.