Harris got a huge spike in popularity initially because she was NOT Biden. She then spent the remainder of her campaign explaining how she would be Biden exactly but less old, as well as trying to reach to the right. Her polling steadily trailed off as people realized it would be more of the same. If she had the courage to differentiate herself publicly in any way, (ESPECIALLY with respect to Gaza) we might be having a different conversation.
If it were the same ratio it would be 70%. 35% is if the death count doubled with zero additional women or children killed.