Do you actually, personally know any conservatives? Do you really believe that they are as horrible as you say they are? Have you ever just taken the chance, sat down, and just talk with them? You might be surprised to find that they are actually human beings, just like you. You might even be surprised to find that they are exhausted and scared. You might even just discover that they're a lot like you after all.
Which is a nice bit of rhetoric. It's worth deconstructing, slightly. It is, of course, directed at conservatives, not at liberals: the Tweeter and the Tweetee are assumed to agree that LIBERALS don't believe that conservatives are human beings; that LIBERALS as a group don't think conservatives are anything like them; and the LIBERALS, as a point of principle, don't talk to conservatives. In the exact moment of saying "Liberals, don't demonise the other side" the other side is in fact demonising the liberals. They could have framed the question as "do you know any one with the opposite political views to yourself?" But they didn't.
Another man on the internet once wrote that Sigmund Freud spoke of "the Nazism of small differences." Rather ironically this was a Freudian slip: what the great man actually talked about was "the narcissism of small differences". But either way, it is a good point. It's a terrible cliche to say that all the political parties are exactly the same and just as bad as one another. But it is also true that more similar two sides become, the more fervently they hate each other. I seem to recall Monty Python wrote a funny sketch around this point. Labour has moved further and further away from it's original left wing principles; they have in fact found more and more common ground with the Conservative Party. And they are understandably reluctant to admit this. I think this post-Brexit centre-right consensus makes the discourse more poisonous than it needs to be. I have an impression that in the olden days when there real, ideological differences between politicians, there was less need to resort to abuse. Enoch Powell and Tony Benn could afford to have a civilised debate about their massive ideological differences of opinion. David Cameron could at least be open about how much he despised Jeremy Corbyn.