The above lyrics from Run to the Hills is inspired by "pinko left" material. That was probably more obvious to people in the 70s and 80s. Especially conservative places like small town Indiana.

Axl back then used to hate all those extreme political views from both the left and the right. That is what ultimately inspired One In A Million where he rails about everyone trying to get up in his business.

It's nice to see these old interviews though, back when he could still be himself when talking to the media. The difference in his demeanor on say Jimmy Kimmel is stark. His soul got crushed in the early 90s.

This is what Axl means about political:

Judging by this Iron Maiden would be considered left wing activists and they used their music to push that message.

There is no alternative timeline where Kasich gets the nomination.

Berlin 51 doesn't have any special significance that I know of. I don't think any important historical events are connected to that year. It would have to refer to something more personal. 

To me it suggest authenticity because why would anyone make that up? Atlas Shrugged as a title also feels from left field in that regard. The track list too has a good mix of expected and weird.