If you have an opinion and find that your opinion is well supported by facts and observations in the real world – what do you want? Would you want to silence other, conflicting opinions and views? I guess not. Yours is the one that chimes well with everything we can see around us and you will want to show the world how right you are. You would not fear any discussion. You would revel in it. If on the other side, you know that your opinion does not hold water, you would be afraid of such discussions. You need to suppress them.
Importantly, none of Richet’s opponents were able to refute the central claim that “the interpretation of ice-core results flatly contradicts the fundamental principles of scientific reasoning.”