Good argument, except he was telling the US to stay out months & years before
http://www.newsmax.com/Newsfront/trump-syria-chemical-weapons/2013/04/29/id/501845/
http://www.usnews.com/news/articles/2011/04/01/donald-trump-criticizes-obamas-foreign-policy
In the first article(Newsmax) his position was no different from the general public. His position was no different from Obama's position at that time, opposed to intervening.
If you had to pick or chose, you could say his position was closest to Rand Paul's position.
Objectively, I have to give Trump some credit for being generally opposed to the NeoCons' influence on foreign policy. This is why the NeoCons have led the charge against Trump being president.