This is just my opinion, but had LeBron either stayed in Cleveland or gone to a different team than Miami, I don't think there'd be much hatred for the Heat if they were rolling out a Wade/Bosh duo.
Without Lebron there is no hatred. The shameful way he announced his decision is what people hate the most. Now for most of the country, their second favorite team is the team that's playing the Heat! Many will be rooting for them to fall on their collective faces.

Sandra