Prime Minister Narendra Modi in his biggest interview this election season with India TV's Chairman and Editor-in-Chief Rajat Sharma spoke on BJP's 400-plus seats target, Pakistan, revocation of Article 370, his government's action against corrupt politicians, among others issues.
Yes, Hinduism is polytheistic. There is a hierarchy of the gods to a certain extent and depending on your sect the most important god can vary a little.
Though I suspect that this is just a translation issue. The interview is in Hindi( I think). I am guessing that the person who wrote the article was writing it for a American/British audience. They probably just decided to use the word god because it was easier and conveyed the messages better the intended audience.