Personally, I try to leave politics out of the equation when it comes to countries I visit, unless I think my personal safety may be at risk (e.g, North Korea).

It's an individual choice but if you're going to exclude countries based upon a particular political viewpoint, then there are many countries you'd exclude. Are you going to boycott Thailand because of their (silent) support for Myanmar and the Thai ruling military junta's record of refusing to make any serious effort to combat human slavery? Is China off your list because of their alleged human rights violations? Should you bypass the Virgin Islands because you can order conch soup when conch is classified as an endangered species in some countries?

Your decision to go somewhere (or not) will make no difference whatsoever in a given country's politics. Your choice of destinations dwindles quickly if/when you begin prioritizing a particular political viewpoint as a deciding factor.

Again, though, if that's important to you - then by all means do whatever you think is "morally" correct. I guarantee that your country of choice doesn't care what you do or don't do.