This is probably NOMB as a Gentile but I would ask why a religious man would pursue an unbeliever, even if she does eventually decide to convert. And yes, she is beautiful--but is that supposed to be the biggest thing in choosing a mate? Also, the Trump family is hardly known for its morality and virtue.
In Christianity pursuing an unbeliever with the hopes that they will convert is called "missionary dating", and it's frowned upon, and I imagine the same is true of Judaism.
I just don't know why he couldn't have found a nice Jewish girl, that was already Jewish.