Anything where people disagree has the potential to start a flame war. I don't get involved with them (And try my best not to cause them), and I'm not negatively affected by them as such. But they can very quickly take a thread off-topic and locked. Once that's happened, the question the OP asked has been stifled because some people can't agree to disagree over the internet. That means ruining someone else's thread, which I don't wish to do.
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I see nothing wrong with discussing ideas and concepts that might seem morally ambiguous, but that doesn't stop others from getting offended if things get off-topic and escalate too much.
Oh, I see what you mean. It's true, you need to bite your tongue sometimes. I definitely don't want to ruin this thread, but it's always a shame if one or two loud-mouthed people start flaming about what was an interesting discussion. I don't like avoiding sensitive topics just because someone might be offended. That's why I try (emphasis on try) to be as careful as possible about what I say, but I will say it if I feel strongly enough about it.
But I am a little sorry about the derail. OP, feel free to kick me out of the thread
Also, please define undesirable
Absolutely not. In the context of my argument, I meant those who oppose the goals of the leading body (government, democratic consensus, values of the majority, whatever). It's completely subjective.
What's wrong with eugenics?
Many, many things. In a nutshell, eugenics took darwinism too far and preached selective breeding for humans. In the context of the era (right before WWII in fact, there's a nice give-away) that simply meant that people deemed 'undersirable' by the governing class should be removed from the gene pool. This included disabled people, criminals, pretty much anyone who wasn't white, but also the poor, because in those days the idea was that the poor were poor because they were not capable of hard work and lacked the qualities a decent human being should have. Fanatic eugenicists (or whetever they're called in English) wanted to sterelize huge chuncks of the population. This actually happened to the black population in th US for a short while. And the there was that nasty little Austrian dude, name escapes me at the moment, something with a pure race and a bunker...
So, you know, if you really feel there's nothing wrong with that, I really can't help you.