I know from experience that dubs talk about Jesus but not about actually having a relationship with him. They talk s lot about his earthly life and his coming in the near future but not Jesus in the present as the head of Christianity.
When I was a dub and heard songs about Jesus or praise Jesus this or that I chalked it up to the trinity and falsehood.
I think that when dubs hear Christians talk about having a relationship with Jesus they automatically put that person in the born again category. And most experienced dubs will tell you that it is near impossible to convert a born again.
Imho