Those who sinned and left judaism have never been as bad for judaism as those who fought to have judaism redefined to be inclusive of their sins. The ovdei avodah zara in nach dragged down most of klal yisroel by not breaking from them. The reformers in Germany were more interested in bringing the Church into the shul than in living the cultured life themselves. And the quest for legitimacy and respect by the modern orthodox of today is no different. No one is without sin, but the focus is on goals. A ben aliyah wants to be better, not expand the definition of what is acceptable to accommodate his current status. And that my friends is the main difference between a pants wearing baalas teshuva who doesnt cover her hair and a modern orthodox woman who has the same appearance.
The Hirscheans learned the lesson well. When someone comes along and wants to redefine the definition of right and wrong, we don’t respect them. We cut them off. Perhaps Rabbi Schwab took a gentler approach with MO because they are not quite deserving of utter excommunication, but the message is clear. They must adapt to our ways, not the other way around.