In the context of argument, emotively charged statements are often used to make value claims without providing evidence. Moreover, their presence may indicate an intellectual laziness on the part of the author not to provide real evidence or reasons for their arguments. Is the presence of emotionally charged language correlated with the weakness of an argument?
Here's a splendid example of a speech with liberal use of emotive terminology. So next time you encounter someone getting over-emotional/going personal, consider how weak their argument must be.