Earlier quoted context omitted.
In fairness, the study was retracted not due to the data but because "The European Respiratory Society, as a leading medical organisation in the respiratory field whose mission is to promote lung health and alleviate suffering from respiratory disease, has bylaws in place that do not permit individuals with ongoing relationships with the tobacco industry to participate in its activities" and in other situations, "The…
I’m not sure what you mean by “politics” here, so I’d rather be explicit and say what it looks like to me. The tobacco industry has a rich history of trying to manipulate public opinion in their favor, and this article and authors’ undisclosed conflict of interest fits that pattern well: a study shows cigarettes are actually good for you in some way, and might even save you from the current pandemic; and then whoops,…
I mean that they explicitly said they retracted the study (in the journal, the authors haven't retracted anything) because they refuse to take any research from anybody who has ever accepted money from tobacco companies regardless of the rigor of the data or research. Non-academic reasons.
I understand their stance because, as you said, the tobacco companies have a long sordid history of research and it's a journal of lung health with a strong "anti-smoking" bent, but calling the study "retracted" implies that it was somehow false or disproven when it has not been.