I don’t talk to liberals about anything important. I gave up in 2008.
(Which is fine, because I stopped listening to them long ago.)
Besides the fact that Leftism is emotion based primarily on control of others, the other main problem with Leftism is, Leftism is based on a hideously expensive and dangerous foundation that is composed of one giant lie, and that is their belief in the following:
LEFTISTS: People are inherently good, and if you treat them right, remove poverty, ignorance and disease from their lives, then all of the bad people will melt away, and we will live in a utopian harmony with our fellow man."
Granted, the people at the top don't believe that (they understand Leftism is power and control of others) but the legions under them do believe it, and act as their useful idiots.
I think many conservatives understand (just at the Founding Fathers completely did) that humans are weak and flawed, and we need a government that protects all of us from a government filled with flawed people, particularly those that have good intentions. (Especially those with good intentions.)
We understand that there are some people who are just...bad. They are not redeemable. They cannot be rehabilitated. They are bad, and need to be dealt with, and not with the love of human kindness. And if you don't deal with them, they will oppress, rob, rape, or murder you, and it won't bother them a bit.