Is it normal that i think we should just let natural selection take its course?

If that were the case, you would already be dead and wouldn’t be able to post such trash, but we can always dream.

First, I would like to say anyone who calls for the death of children should die themselves. As the King Missile song goes "As a fellow former fetus, I wish you had been an abortion."

Second, you think we shouldn't give benefits to the disabled. What about firefighters, police, soldiers and all the others who have sacrificed themselves for our benifit who have been disabled on the job? To hell with them right? And what about those who do contribute to our society after they are disabled? Sorry Steven Hawking all that work in astrophysics doesn't matter.

Third, people in poverty and the homeless. Wealth is not part of natural selection. All the digital zero's in the world will not save you from a desperate person. If you do as you suggest it's only a matter of time until the poor rise up and start taking from the rich. And not by asking.

Welfare isn't just about propping up weak people. It's about protecting the economy and society for everyone. Masses of starving tend to revolt and kill the rich people. It's better for the rich if the poor have basic means; enough to keep putting money back into the economy (a good thing for everyone) and are fed well enough to stop them rioting and causing a ruckus.

And natural selection never stops. We've just changed the environment and the traits being selected. But anyway, ethics aside, I'm pretty sure that what you're proposing would just cause more problems for the people who are fit enough to support themselves.
If it weren't for that though, I think what you're suggesting would be much more likely to happen. I don't think people in power support the poor out of the goodness of their hearts.

I can see that as a misguided plebeian, you need to do extra thinking here.

Firstly, placated poor people contribute to social order. This social order protects us, the elite 1%. Crazed poor people will break any law, destroy any building, steal anything if necessary to survive. It is best for the government to make sure that the lowest 20% are mildly obese to lessen this threat. The resulting diabetes epidemic makes them miserable, but so what? Trailer park trash can buy veterinary insulin to shoot up really cheap.

Secondly, the greater problem is that addictive drugs fuel social destruction. Special ops snipers must clandestinely kill drug lords in foreign countries on sight with 500m kill shots.

Mind your own business.

Who is strong in 2018? The marathon winner that is dumb as a rock? Or that dude in the wheel chair that speaks genius with his cheek? (Stephen Hawking). Have a direction for your eugenics.

Absolutely, there's only so many people you can support. If you keep letting the retarded life then that burden becomes greater and greater until eventually, it's back-breaking. Not that it's really a big issue anyway, we've completely fucked evolution with other things, contraception, abortion, benefits, looking after the retarded is just a drop in the bucket we're already fucked from an evolutionary perspective. The poor breed the most and that's how it's going to be.

No. If the person is suffering or will never have a full life, then yes. But if they can still live a happy life, then they should be helped.

Humans are only as strong as the weakest link...
that doesn’t mean we should kill all the weak links in life. Just because they seem invaluable in one aspect, they are valuable in many others.

The greatest story never told.

You sound NAZI

There seems go be a major lack of morality.