As a Scot, I have to admit this is the worst choral version of Dulaman. Singing it operatically does not work. Should have been sung much more dramatically and without the operatic tone.
WTF does your nationality have to do with this performance? You didn't write, arrange, or sing in this version, so you don't have any reason to admit anything. You can offer an opinion that this version of the composition is the one least enjoyable to you. However, I don't believe the majority of viewers would share that opinion, including your claim thhat this is performed operatically. As an Irishman, it may not be ANÚNA but it sounds perfectly fine to me.