I am currently conducting research on the persuasiveness of contrarian positions. I'm crowdsourcing a list of unpopular beliefs that people may have for which plausible-enough sounding arguments could be made in support of them.
Existing topics that I use include, "climate change is not primarily caused by human activity", "nuclear proliferation is good for global stability" (an argument made by Kenneth Waltz), and "recycling is bad for the environment." While I don't agree with any of these, compelling-sounding cases can be made for them.
Edit: Feel free to PM me beliefs if you don't feel comfortable publicly sharing.