One of the reasons people wanted Trump was that he would look at things as someone outside the political arena. And in a lot of cases, that's good. This case is not one of them.
He's been pretty consistent on this score, when he goes into these "developmental relationship meetings" or whatever you want to call them. It's all about "do we like each other" and "we have a great relationship." He's more concerned with building a groundwork work deals than he is posturing and scoring points - which is odd because he's all about posturing in other contexts. I think it's because in his heart, the thing he loves most is the deal-making process. And he's not about to screw that up by saying something bad about someone and painting himself as an adversary or an "enemy."
It would be interesting to see how much Trump actually believes of what he said. But it doesn't surprise me because he's used the same types of language with everyone he's met with. He did call out Germany for buying Russian oil - kinda weird thing for a Russian mole to do, right? And he certainly has had strong words to say for his allies at times. But that's deal-making. You can take stronger stands against people when you have a stronger relationship and have mutual commitment to a common interest. In Trump's eyes, this is just another board meeting, and the guy on the other side is a competitor that wants to make a good deal for his business/country. You don't go into a business deal treating the other person as an "enemy" - and so he doesn't.
So I actually understand why he's doing it, and no, it's not because he's on the Russian dole. That doesn't mean I don't find it stomach-turning to talk about Putin as anything other than what he is. The reality is that in actual political deals, you can't just ignore that one side is trying to undermine the safety, sovereignty and security of your nation. I didn't like it when Obama did it, and I don't like it when Trump does it. HOWEVER... the difference so far is that I haven't seen any of Trump's actual policies reflect this. Obama was completely different - because he ideologically BELIEVED that the U.S. was responsible for all the bad stuff, and his decisions and actions reflected that.
So the treason talk is just stupid and ridiculous posturing.