Technically true. Finns are objectively slightly genetically diverged from the average White European, as are Estonians and Hungarians, as evidenced by their languages belonging to an entirely different family from all other European languages. That said, the "slightly" is carrying a lot of weight. These people may descend from a seperate culture that settled in Europe, but they've lived alongside Europeans for over a thousand years. That's over a thousand years of intermingling and interbreeding with true Europeans, with whom they were only slightly different to begin with. They're White in my book.