Adapt to a new culture but retain your ideology

I take pride in being an Indian and more so an Indian with an modern upbringing, open minded thought process and yet a conservative value system.
At a very young age we learnt to speak our minds out and think independently. Freedom of expression and crucial decision making were one of the biggest gifts my parents could have given me.
I often took this for granted till I got married into a conservative patriarchal family. While my in laws would love to believe that they are open minded, I'd beg to differ. My husband is still strongly influenced by his brother and father. Many a times I find my husband victim to my father in law's decisions as he has the final irrational word to almost everything. Most of my ideologies and philosphies differ from my new family so to accept advice I find no sense in is almost impossible. I have always lived life on my terms and managed my finances. While I know I need to adapt to my new  circumstances I am not ready to change the way I think especially when it has worked for me. I do take advice but it has to have concrete grounded logic and not decisions made on a whim or an ego trip.
I'd love to elaborate on some of the foolishness that I am made to believe and accept but may be on another blog. Till then to all those sailing in my boat, stand for what you know works for you, you may have to listen to bull**** but following it is  always a choice. One may agree to inflate the ego of another by agreeing but let your action please yourself.