This is easy for me to answer:
1) Leaving the USA ( I did not leave for political reasons, but to marry)
2) Watching my wife suffer and die.
3) Discovering truths about 911
Here's the why and how of it. It's something I've thought a lot about.
Leaving the USA allowed me to experience a western culture that wasn't (as) immersed in USA worship/politics. When I came here I was confronted with views from some people I found difficult to refute. These people weren't necessarily Aussies of British decent. Some were from Europe. I remember distinctly being questioned honestly on a subject that I had no good answer to, and I was forced (that is, I forced myself) to confront certain beliefs that didn't originate from me, but from American media programming. It wasn't as if I didn't question official narratives at all in the USA (for instance, I long suspected the US presidential election to be a horse and pony show for the multitudes and whoever landed the office to ultimately be a front person for special interests. )
After my spouse died, I decided to dig deeper. That was actually painful, but it was acceptable to me, because even though it was painful, the pain was nothing compared to losing my wife. I wanted to know more about things I was indoctrinated with, and how I was deceived. One of the more recent events was 9/11. People from all around the world (including the USA) presented evidence that convinced me the official story was a lie. So why lie? Just to protect oil and prop up the dollar? Just to protect Afghanistan's poppy fields? That yes, but more. The more came gradually, by little bits and pieces, over the years.