So in your opinion he wasn't being honest with any or all views he presented in that interview and it was just a tactic.
I think he mixes in lies, exaggerations and half-truths into truth then spouts off. For example he called Hillary a friend in that clip. Yet during the campaign he changes that relationship into one of a corporate fat cat (him) and a paid on demand politician (Hillary). He brought this up a few times if I remember correctly. There was once where he said he donated to Hillary so she showed up Ivanaka's birthday party. Another when he was asked about his donation to the Clinton Foundations and called it "Doing business" (paraphrased). His views on Europe, in my mind, changed only because Trump's position went from a CEO to POTUS. Europe not responding well to Iraq 2 didn't harm his business nor reflect on him as a CEO. Now that he is POTUS the views of Europe reflect upon him as a leader.
I think a lot of what he said are the BS pleasantries and lies politicians tell when the camera is on about each other. The change is who these pleasantries are for. As I said now he is saying similar positive lines about GOP members as it is expected, and help him and the party behind him. It could be called a tactic but I think it is one so common place it is about as common as "hold the high ground" or "do not use cavalry against a pike wall" level of tactics; common knowledge within the subject.
Were his other views in that interview also just tactics?
A lot of what he said is basic political decorum no different than workplace decorum in my mind. It is something to be expected. I am not sure tactic is applicable in that case. I think a tactic requires more thought than just following the status quo of the time.
Like I said it seems like he uses a truth like donations to Hillary and at best an acquaintance based relationship spun into a friendship with common platitudes of the time he does not hold as the lies. I would call the quick formulation of media friendly and popular soundbites the tactic in all of this not necessarily what he said itself.