Trump was right? or who really committed treason?

Treason is the only crime defined in the US Constitution (Article III, Section iii):

Treason against the United States, shall consist only in levying war against them, or in adhering to their enemies, giving them aid and comfort. No person shall be convicted of treason unless on the testimony of two witnesses to the same overt act, or on confession in open court.

Prosecutions under this section are rare since it requires the act to take place during war time.

I'm no fan of Donald Trump.

On the other hand, whose administration decided to arm a group on the US State Department's list of Terrorist organisations. An action that would eventually lead to conflict with a NATO treaty ally?

Of course, you can't just blame Obama since congress knew, but did nothing about it. In a previously posted video, Lindsay Graham asks about the Kurds being listed as terrorists. Sen. Graham was among the harshest critics of Trump’s decision this week. Graham was once sympathetic to Turkish concerns and called the partnership with the Syrian Kurds “the dumbest idea in the world” in an April 2016 Senate hearing, given the PKK connection (clip mentioned above).

The question is who in the US was in charge on September 22, 2014 when the US began its involvement in Syria!

See also:

• The US played down Turkey’s concerns about Syrian Kurdish forces. That couldn’t last.