I wanted to chime in on the point about the parents being defensive when it comes to the changes we make in our lives. I did the same as you and completely changed my life. Actually all of the siblings in my family did (I am 1 of 3 girls). It was pretty amazing that we all became shomer Shabbos/kashrus. I did, however, go farther than my sisters and decided to move away and live in EY (where I felt I had the best chance to raise my children in the way I felt was the best). I missed seeing my parents, but being in EY made it worthwhile. My mother, a”h, would probably have wanted to become shomer Shabbos as well, but she and my father were pretty old by the time I jumped on the bandwagon (actually for different reasons than my sisters), and the change was too hard for them to do. On the other hand, my father had some bad experiences in his youth with supposedly religious family members and he harbored a lot of resentment towards “religious” people. He could not understand for the life of him what it was all about and basically decided that it was just craziness and held no intrinsic meaning.
It was easier for me to deal with him if I kept remembering that he was probably also angry about the fact that all three of his children rejected the lifestyle he chose and went off in a direction he did not agree with. I tried to keep in mind that this state of mind would only affect him in this world and that he would obviously enjoy the fruits of our labors when he would get to the olam above (which is where he is now).
If you try to talk to them and find that they are not willing to speak less antagonistically than they do at present, then you will be forced to separate more from them, so perhaps moving with one of your promotions would be the easiest option.