It Atwood had expressed a controversial opinion in respect of anything other than trans rights there is no way you would be arguing that she must have lost her mind. That's the bloody point!
Have aread back over the posts you are smugly laughing at! You aren't the only perosn to be talking about the difference in perception and her own thinking. You are just the only poster who is using that discordance to belittle other posters. Why do you feel the need to do that?
How many, including me, have pointed out it is the cognitive dissonance that jars! We read Atwood and her writings filled a space in our own thoughts, our own feminism. For years we have managed to ignore, or even not know about, her liberal feminism as her writings strike a different cord to many different women.
Her tweet has brought that into bright lught. We can discuss it, some of us are. If you don't like it the least you can do is ADD to the discussion rather than detract from the posters!
In short, stop acting like her least likeable female protagonists!