What's worse atheists being critical of your religion, or theists?

That Q about theists mocking atheists and vice versa got me thinking, it isn’t always the atheists who might mock religious beliefs. In fact sometimes the atheists are the ones defending them. Sometimes the Baptists are critical of the Catholics, and the Catholics of the Mormons, and the Mormons of the Muslims etc.

So, I was wondering from the theists point of view, is it easier to hear generalizations or criticism from other religious people, or even to have a in death religious discussion, because at least you both have God in common? Or, is it all the same?

This is not a Q to debate religious beliefs.