Did he mean to say "passion" in this case? How is hate a "good" sign of engagement? If someone has an opinion and is willing to share it with me, I'd hope they could do it in a constructive way (but I wouldn't call that "hate", and this is the Internet he's talking about).
Imagine being surrounded by 100 people hurling insults at you, telling you you're no good and your product / service / art sucks. How is that a "good sign"?
Edit: Maybe the assumption is "For every hater, I find 10 people that _do_ like it", so the realization is that "I'm reaching people," and the underlying prayer is that "And hopefully, they're not _all_ haters."