Inny, I completely understand the problems that come up with families from different cultures with different values. Since my hubby is Romanian, there are huge differences between their thoughts and mine regarding a lot of different things. Luckily I don't have to live with the inlaws or I'm sure I would go through the same kind of stressors that you are going through.
I know that when I don't understand why Florin's family thinks for feels a certain way, I try to ask him where they get their thought patterns from, what drives them to believe in certain ways, or act in certain ways. And he also does the same with me when he doesn't understand my values and ideals. Keeping the lines of communication open are very very important for both you and your bf's family.
Wishing you well my friend!
sabby