Maybe in the tradosphere but when you are in his presence you KNOW he's not Catholic. The man didn't know Latin in 2015. I was at that Mass and the MC had to say the Credo for him. Totally invalid sacrament. We didn't receive communion and never returned after that.
Ah, he'd write off not knowing Latin to having done Eastern Rite Liturgies for decades. By itself, the MC saying the Credo wouldn't invalidate the Sacrament, yet this would render the rest of it suspect as well.