It's a slightly ambiguous parse. > we slowly start to see ideas we once would have rejected out of hand as "reasonable" only after... I think you parsed it as

It's a slightly ambiguous parse. > we slowly start to see ideas we once would have rejected out of hand as "reasonable" only after... I think you parsed it as > we slowly start to see (ideas we once would have rejected out of hand as "reasonable") only after and concluded that "unreasonable" was intended. But I think the proper parse is > we slowly start to see (ideas we once would have rejected out of hand) as "reasonable" only after