Your translation was very funny. Kudos. I am a Social Democrat, too, what a cool coincidence! Let's hear it for the welfare state!
(so how can you be a Social Democrat and have Socially Darwinist views on the PD? )
by the way, Human cultures disagree on ethics too, so bringing in alien cultures changes little in that sense.
You and I have far more in common than we have with a Klingon. We value life, he values death, he values aristocracy, we value democracy. The only way to peacefully coexist is to not force our values upon him. Lets be honest, who doesn't feel at least that this wouldn't be too bad, if these foul-smelling brutes learned to regularly take a bath, to eat normal food, to stop their fights, to drop their honour concept ... but that's why we have the Prime Directive, to remind us that our instincts, our intuitions and our common sense that cries "let's educate and civilize these brutes" is wrong.
The question is, how come you watch Trek if it is advocates social Darwinism? To adress your question seriously, let's take "Dear Doctor", probably the Trek story which is closest to your PD reading to illustrate why it is a wrong reading.
Phlox might claim it is about evolution but it actually is about the power structure of two groups.
If you help the Valakans you gotta help the Menk unless you wanna empower the former at the cost of the latter. You help both groups and before you blink you are the alien force behind a civil war.
Starfleet is not out there to either assist A at the cost of B or in order to set up A against B and vice versa. Or in other words, it might seem like help on the first glance but once you actually think about you realize that it is actually favourism or something even worse.
