Again, the Hungarian-speaking part of Transcarpatia is a fairly small area, see the convenient map[0] on Wikipedia. Most Rusyns in Ukraine live to the north or northeast of that small area in green. These are statistics that you can consult for yourself, no need for anecdotal evidence. Congratulations, your wife’s granddad must have got stationed in one of those very few communities in Transcarpatia where Hungarian is spoken. That means nothing for categorizing a people spread over Ukraine, Slovakia, and Poland as “akin to Magyars”.
You do realize that the vast majority of people from Ukraine passing the Hungarian nationality test are ethnic Hungarians, not Rusyns?