He has done the minimum arming for the Kurds. Pretended to support them when forced to, or be embarrassed by public ridicule.
Right. Christians also get no help. But ISIS is using US arms and driving Toyota’s paid for also by the US. Their Iranian rivals are also being financed and allowed to develop nukes. At the same time he arms Israel. It is like you wrote, he arms some because politically he is forced to in order to cover up who he really supports. But it is not hard to tell who he is really for: look who gets nukes. It is like he wants to start WWIII and he has chosen a favorite and stacked things in their favor.