Not the OP, so I'm not claiming to speak for him, but here are some views I've seen really upset left-leaning people despite having a fair amount of evidence to support them: heterosexual two-parent households are best for raising children, rape is less common now than in the past, unrestricted immigration hurts low-skill workers. I'm not necessarily saying these are all true, but they're at least open for debate, and you will lose friends in some parts of the US for voicing these opinions.