As far as we know there is nothing in the laws of physics about death (or life). It's all about fields and particles. Or maybe strings or loops or something else, but vitalism (https://en.wikipedia.org/wiki/Vitalism) is over.
So death "is" inevitable only because we don't know how to prevent it.
> How many more years must humanity be shackled to superstition and death fear before we fucking get over it and move on to the important work of getting off of this planet?
I'm totally okay with space colonization but conquering death (with science, I mean) seems like a more pressing issue. After all, even if we already had space colonies people would still die.
First fuck up the planet, then leave, does not appear to be a trait of highly developed civilisations. More one of perishing ones.
(I do share your distaste at the way some Christians have seized on this as a preaching opportunity.)
As an atheist, I'm entirely fine with you finding comfort in whatever you like, even if it is completely irrational. It is your business. I also accomplish nothing by being "militant" toward people simply for believing in something. That is best reserved for situations where that belief or things drawn from it are imposed upon the rest of society. For example, in public education, science, politicians, taxation, decisions of national importance. Things where that belief impacting beyond the scope of an individual's life are forced upon everyone and on behalf of everyone.
However, it is also quite ridiculous to use this opportunity about an important topic to start telling people they should somehow convince themselves to believe in something metaphysical, because "it'll bring you peace". You aren't the Hare Krishna and this isn't the local airport. Let's leave the discussion at something like "I'm religious and find some solace and peace in my religion that helps me cope with potential mortality".
Telling people they should "believe in jesus" and linking to ridiculous books or interviews about why they should believe in jesus in incredibly self-serving, inappropriate, and counter-productive.