Something to keep in mind when you are dealing with leftists.
They like to change the definition of words and they are usually very short on specifics. Never assume that they are thinking of the same definition of a word that you are, make them clarify, if they won't, or evade it, then you know you probably have a liar on your hands. They also tend to speak in broad general terms, which everybody does to some extent, but they go way beyond that.
Always make them clarify the definition of the words they are using and ask for specifics regarding what they are talking about. Don't let them get away with just saying, "them," make them define who, "them," is and specifically. And of course ask them for proof of whatever assertions they make.
Think of it like a courtroom, you can say whatever you like but unless you can reasonably prove it you got nuthin'.