Do you have a proof for such a statement? AFAIK most of negative externalities are either negligible or easy to be sued for. Or a responsibility of informed customer.

Of course, there's that ultimate hammer of greenhouse gases everybody is using daily, but besides these it is hard to confirm this. And these have also many positive externalities (access to plastics, cheap energy) that cannot be ignored, otherwise we would live in carbon-zero economy already.

Really? Why then are communist countries the most polluted?

Do you actually have anything to say, or are you just going to avoid having to form coherent arguments by saying “what about communism” to anyone who replies to you.

If the claim is "huge external costs", since those are not quantified, then it's fair to ask "compared to what".

So I compared it to communism.

If you have something else to compare it to, feel free.