Fortunately, we can make them from scratch these days, but that probably won't happen until we're more Earth-independent, as in building O'Neill colonies in space.

Our current hydrocarbon feedstocks used for making plastics (ethylene, propylene, etc.) come more or less directly from oil, and we would still need them even after all electricity is nuclear/renewable. The other, probably more important, use of fossil "fuel" in manufacturing is coke for making steel. Coke is basically coal processed to reduce its non-carbon content so that it is suitable for use in blast furnaces which make hotmetal iron for basic oxygen furnaces ("basic" being a chemical sense of the word - the big ones can make three hundred tonnes of low-carbon steel in half an hour.)

Feel free to share this in libtard circles - elaborate if you're an expert, in order to trigger anti-steel and anti-plastic responses that will further redpill the normies as to how insane they are.

Oh, and because I just remembered, there's a nasty acid called ferric chloride which is used to make circuit boards. Figure a way to work that in and it should produce a full blown anti-technology meltdown :)

Think about it: "MAGA" stands for Make America Great Again, while "Krav Maga" is an Israeli martial art...