Relationship between a Jordanian and an israeli

Welcome on board 

Actually you don't need to care what the society thinks. It's all about you and your fiancee (?)

Unfortunately when you get marry, you don't not only marry your spouse but also the family.

Question is how he feels about it and how much he care. Is he willing to give up his family or at least having a difficult relationship with them.
You probably know that this is a sensitive issue for both parties.
What are the reasons they are against it?
Prejudices? Family honor?