Surveys of Buddhists in the USA and Europe confirm the partisan left leaning of American and western Buddhists. In annual surveys in the USA Buddhists have been found to be the most partisan of all religions surveyed.
I assume that converts to Buddhist were already left leaning when they became Buddhists but I don't know of research on this question.
This suggests that convert Buddhists imported the political beliefs they already had and continued to privilege those secular beliefs.
Theories to explain this partisan leaning deserve a thread of it's own. One possibility is that early popularizes of Buddhism in western countries were politically left leaning, taught an interpretation of Buddhism that appealed to leftists and thus created a self fulfilling cycle that favored or "privileged" a leftist view. A kind of variation on an old boys club.
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Buddhist Ethics is a Fraud
“Shakyamuni Buddha, 2,500 years ago, taught exactly the same ethics that was only rediscovered in California 30 years ago. He was a feminist, and sexually liberal, and environmentally conscious, and anti-racist. So great, we've got this religion that completely validates all the correct ethical positions and it's 2,500 years old.” - David Chapman
https://art19.com/shows/buddhist-geeks? ... 2117dfe1ef>