I think she's just trying to sully his name in advance of her own run at the leadership. I am challenged to understand how his stated goal of returning the PC party to government is "causing harm or disrepute". As to uniting the WR and PC, well the federal Liberals coasted through several elections on the back of a divided right. Surely Albertans don't want the NDP to have the same opportunity?
same could be said about the conservative from 2006 onwards. It's better to not say that because it's not that cut and dry.
Back to alberta though, it's illegal to unite parties. Can't merge assets or money. So there are two ways to unite the right. One party ceases to be and joins the other right wing party. Wildrose is bigger, has more money, has more seats. They won't fold. Brian Jean won't step down.
The other way is to fold both parties and make a new party. Starting from scratch too, because the new party wouldn't have access to the assets and money of the two defunct parties. I believe this is the path Kenney is taking and if you run for leadership promising to dismantle your own party I can see where that falls under causing harm or disrepute.