There is no "way it's supposed to be pronounced". It's a cultural thing. Words are spoken differently in Spanish (and in all languages). That doesn't necessarily mean that "hay-zoos" is the right way to pronounce it.
It's called transliteration for instance no one knows how his name is actually yeheshua which the Romans transliterated to iesua or iesus and we in turn transliterated that to Jesus
What do you mean? The English pronunctiation is obviously going to be different than then Aramaic one. In my language we say it different and so in most other languages.
That's true, however, out of all the people named Jesus, I've never herd anyone of them being called "jeesus," not even by Caucasians, I don't undersand.
it is. just if you are hispanic it is different
Because no one speaks Aramaic?