What is wrong? What makes something right? Why are you acting so silly? What gives you the moral authority to deny someone based on a "decoration" even if its not a decoration what makes it wrong?
Do you know that the cross is an evil sign because only the lowest criminals were crucified? Do you know that a lot of the iconography and symbols of the church were adopted from previous religions of the local area in order to christianize them and give the local populations something that they could hold on.
Christmas was moved to Dec 24/25 becase the 24 was a pagan holiday so they would use this date to preach to them about jesus.
so you are being judgemental and the same thing you are trying to do" let her see your point of view" you should do and see her point of view. you shouldnt be so hard headed. and learn to love
you will not go to hell because the food you buy has a buddha. btw he teaches the same doctrine that your great lord jesus christ, peace be upon him, taught?
god gave us to choice and if you choose to follow him blindly by what other people told you is correct. i think it is just plain ignorance. you must follow it because it is you who has that personal relationship with god. if she chooses to eat there good for her. if you two don't agree on this than both of you shouldn't get married because you will disagree in bigger concepts of life.
i feel desperation from your side. remember that god wants you to be free and being stuck in a strict religion sometimes does not allow that.
i will pray for you and hope the best for you.