Honestly, mass produced Chinese products
are crap, but it has nothing to do with the ethnicity of the workers manufacturing them. Most Chinese products are made in large quantities at as low of a price as possible. It's not something that can really be argued, it's basically fact. That isn't to say, however, that non-Chinese products are inherently better, they can be just as poor a quality as Chinese products.
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King, I think that I can give you some advice based on the fact that we're a similar age and I have an 11 year old brother in a similar situation to yours. I am also an Atheist (Antitheist actually, but only when people properly understand what that word means), and I also have some greatly differing views to my parents. My 11 year old brother is very easily influenced by the things that my Dad says, and both myself and my other younger brother (a year younger than me) were easily influenced by the things that he said too. The thing is, at 11 years old, and in your brother's case, 13 years old, you
are very easily influenced by those you look up to. I was influenced by what my Dad said all the time, but being that I was raised to think for myself, I soon learned that some of the things that he says just aren't OK, and that they're more of a product of his generation than anything else. There's a good chance that your brother looks up to you in some ways, even if he's never said it, and it's likely that if you set a good example for him, he'll end up being an open, freethinking person just like yourself.
I disagree with the notion that you need to somehow "steer" or "guide" him in the "right" direction, rather I believe that people in our situation are best off setting a good example for our younger siblings and making sure that they know that we're here for them for absolutely everything. Whether that be asking about girls, sex, religion, social issues (racism, sexism, etc), politics, or anything else. If your younger brother asks a question about something, do your best to explain it to him in a calm and rational way.
You should also not be afraid to correct things that he says, but that depends entirely on context. If you're in the car with him and he says (absolutely random example), "look at that stupid black guy" or something, correct him and point out what he said wrong in, again, a calm and rational way.
Best of luck, and respect for being concerned for your brothers development... it's only natural to feel like that, imo, so don't feel as though you're doing something wrong. Just remember that he is his own person and he will develop his own personality and character in time, just as you did. You seem to have turned out alright despite the issues you have with your parents, so unless something drastic happens, your brother probably will too. :)