The other might not have been or seemed concerned, possibly because the other one was lying, or, and I have a particular theory about what hell actually is, (and the one probably didn't have enough time to explain this), but you would have been reborn or reincarnated "here" which is what I believe hell really is, and that we are all re-born either here or there, possibly reborn many times till we transcend to there and it might have known this to be your destiny either way... The one might have shrugged at the other one, thinking, "Oh, OK, you had to pull and play that card, Huh? Oh, well, doesn't matter, she'll get another chance to be with us and will be with us in time, but you will not." The one might have also been possibly trying to protect their secret about what hell actually is, possibly, because the fear of hell has saved many over the years, and if they knew the truth, that would be gone and many would be lost...
But, I suspect he/it shrugged more to and in response to the other one who was also using the fear of hell, but, I just don't think, in light of your situation, the one did not have enough time to explain or didn't want or wasn't ready for the secret of that to be brought to light... He was probably angry at the other one who said that to you... Also, like I said, the one might have been lying, cause he is allowed to lie, and the other one has to be honest, and you might not have actually gone to hell afterward...
Any of these scenarios could be true...
But, I don't think the one was concerned cause he knew that while the other one maybe wasn't totally lying, he was definitely intending to "deceive", and the one knew you would have either, got another chance, after you died, or it was a complete lie and you would have actually gone to heaven... Or it knew, that even if you had to be reborn here, in hell, again, it might have known your eventual destiny to be heaven either way, and therefore wasn't that concerned about it, more for the other one to see and know I think, than you...
Saying to the other one, "So, what... She will be with us, in time, you have nothing, oh, enemy..."
The one laughing knew they had "got you" and "got" the other one with that whole "hell" bit. And perhaps he did, but no longer, it's time for the charade and facade to come down, no more fear...
So, as you can see, good angels have quite a different perspective on only the first death here than we do, my dear...
Just my theory...
God Bless!