[...] The Earth is a very small stage in a vast cosmic arena. Think of the rivers of blood spilled by all those generals and emperors so that in glory and in triumph they could become the momentary masters of a fraction of a dot. [...]
We all do it: we have assumptions in form of learned concepts or experiences, place importance on some of them and then use it to prove a point.
You state that it didn't "struck a chord with you at all" and then proceed with your assumptions / value system ("... physics formula can have eternal significance within the grand scheme of things"). For all positions, assumptions and opinions there exists a position where all of it doesn't matter.
Trying to be scientific is also a belief system. Recognizing that all human beings share the trait of having assumptions (some of them called facts) and deriving behavior and opinions from it is the key.
This understanding can support empathy which was generally a good strategy to have in the past (e.g. even monkeys implement fairness concepts based on individuals trying to manage resources in groups which IMHO is one important aspect of the origin of empathy).
I can understand your position of relativism, but it's very close to nihilism. This is not inherently bad (nothing is good or bad, anyways - I'm also a big fan of relativism), but it can be detrimental to mental health and overall well-being.
The tactic may be too simple to "get you", but your point of view is equally flawed in another way (as well as mine).
The question is: What are you standing for if you don't find his arguments convincing? Nitpicking and being anti is not a good long-term strategy, maybe we can help him with better arguments for empathy that resonate with scientific-minded thinkers like you.
> glorified copy machines
> So I strive for one thing I know I cannot achieve
There's some serious cynism going on here. Maybe cabaret artist is something for you to consider. The late George Carlin was incredibly funny because of it.
Some people love jokes based on materialistic and dry analysis of human behavior. I do.
[1] https://en.wikipedia.org/wiki/Ebola_virus
[2] http://www.nationalgeographic.com.au/nature/the-worlds-large...
In the context of the cosmic arena, the Holocaust is no different from me stubbing my toe in terms of impact and significance.