Should I, an employee of Amazon, quit, if I do not support this policy?
Personally, I'm unwilling to work for a company who's values are in severe opposition to my own, so I would probably quit my job over something like this (if I felt strongly enough about it).
The business and government leaders of the world have, over more than a decade of decisions, put us on this path, what's going to happen will happen. Don't sacrifice your life in some futile attempt to "do the right thing", it won't change anything other than harm you.
https://www.bloomberg.com/view/articles/2015-08-17/a-job-at-...
Personally, I'm able to distinguish myself from the company and I my identity isn't the company's, so I wouldn't see a need to quit my job over something like this.