Being of a particular political persuation doesn't mean you cannot be objective however. I don't think sociologists being right-wing are likely to do any better job than sociologists being left-wing.

In fact if I was going to speculate I would assume a left-wing sociologists would on average do a a better job. Why? Because to analyze various human societies, culture and relations you need to have a pretty open mind about other people. That is more common among leftist political ideology.

Right-wing political ideology tend to have a higher chance of having people who are disapprovoing of people of other cultures and traditions. Many are often strictly religious and reject anyone with another religion as lesser than them or more immoral. I don't think you do a good job of being a sociologists if you are being judgemental, which is more common on the political right.

You find more poeple on the right being judgemental towards other religions, people with other sexual orientations than themselves,

I experienced exactlyt the same while living in the US. American conservatives I met tended to be far more critical of other societies, while liberals tended to be more open minded about other societies. I had conservatives tell me America was better place to live than my native Norway time and again without actually knowing anything about Norway.

Mind you I never started a debate about which place was better. It would just pop up in conversations that I was Norwegian and I was studying in the US, but planned to go home to Norway soon. Conservatives typically found it very strange that I was willingly leaving the US. They insisted the US was the best country in the world and that nobdody in their right mind would want to leave.

I don't people with that kind of attitude are well suited to studying other cultures and communities.