How do you weaponize hate? You arrange it in lines and rows, and you learn how to turn it on and off. You find people who are content to be told what to think, what to wear, and who are easily moved to the madness of hatred just by seeing a name put on a glossy sheet posted in a special place.
That is all Leftists do.
With regard to Paul Ryan, the interesting problem they face is they are trying to demonize someone whose voice they cannot silence. He can speak for himself, and does so articulately and from a basis of considered and informed opinion. In my view, goose stepping to the beat of the old playbook is not only not going to work, it is going to reduce the effectiveness of that tactic considerably.
In propaganda, you never, ever, ever want people to be able to compare the view you are spouting with an articulated reality. Not only do you not carry the day, people stop listening to you. Obama, quite simply, does not have sufficient control of the media for this to work, which means that the more Ryan talks, the more certain a victory in November becomes.