Sorry for your experience. Unfortunately this is a common occurrence related to IC. This is why it is important to find the right one, and it is also important for those whose WASs agree to IC find the right one. So many are hostile to marriage. Couple that with their main goal of helping you, and you can see how quickly it can go in the direction it went for you.
As another poster pointed out, your IC may be completely right. There may be no hope. But as R2C pointed out, no one knows that for sure! None of us have the luxury of looking a month, a year or a decade down the road to see what the future will bring.
At this point you have a choice, you can schedule another session and explain in the first 5 minutes that you are opposed to D, it is morally reprehensible to you, and see if the IC can get on board with helping you within the bounds of trying to save your marriage. OR get a new IC. I tell posters here all the time to feel free to shop for the right IC. there is nothing that says you have to keep the IC if you don't agree on something as fundamental as saving your MR.
Also, here you got yourself all worked up that he didn't care anymore and last night you saw that in fact he does! Asking how you are, having tears in his eyes, all signs that in fact he is still in there somewhere. While I caution against getting your hopes too high, at the same time it shows that just because he goes dark for a while doesn't mean he has moved on. Slow and steady wins the race. Impatience is your #1 enemy in DBing.
M(53), W(54),D(19) M-23, T-25 Bomb Drop - Dec.23, 2017 Ring and Piecing since March 2018