Because it's inspired by it. Which makes no difference, people sample and are inspired by different cultural music all the time (just look at this games music in general). This, sadly, is just goalpost are being set and moved to try to make people look bad and try to rally more people to join Sena's side.
I mean The greatest Mazinger theme is inspired too and not once when someone said they preferred The Guardian did I immediately think they were racist (maybe they just like JAM Project). I grew up with this type of music in my church and do not even see what Sena is even getting on about. This is a truly horrible take.