Eich is going to destroy Mozilla over his own ego of wanting to be CEO, when anyone worth their CEO-salt knows that there is no chance in hell that they can effectively lead with this much controversy hanging over their head.
I'm talking about things like Firefox trying to imitate Chrome at the expense of usability. Or the abandonment of Thunderbird. Or resources wasted on a failed effort like Persona, or wasted on software like Firefox OS that's inherently inferior to its many well-established competitors.
Mozilla's influence is directly related to the number of people using its software products. I see far more of its existing users moving away from its software due to usability problems or a lack of maintenance than I see moving due to purely political anger directed toward Eich.