Hhahaahhaa I love how you guys argue which team he supports!
Have you ever heard of people supporting one team in each country?
Spain- Real Madrid
England- Man Utd
Italy- Inter
It's not uncommon. Actually, it's the most common thing. He just supports one of them more than the other, or maybe all the same.
I, for example, support Panathinaikos and Inter. Panathinaikos a bit more as it's more local for me, grew up with them, runs in the family etc. Also Panathinaikos is not just football, it's many sports. When PAO and Inter face off, I simply don't watch the games. Can't be happy my team scores when the team concedes is another team I support almost the same.