Hmm?
Alright. Let's break the general conversation going on down a little more.
Non-Bernie supporter - We have distinct concerns about whether Bernie can actually win, given various things. For Skeptic Ginger, specifically, she's expressing strong concern about how well the GOP's attacks on Bernie (and Biden!) in the general election will affect things, given how much solid material the GOP has to work with (for them).
Bernie supporter - Look at the current match-up polls! Bernie can win!
Skeptic Ginger - Those current match-up polls do not include the certain future event of the GOP unleashing a veritable flood of attacks on Bernie (which they're pointedly and intentionally withholding to a trickle now, unlike the attacks on Biden), attacks that will be more effective because they're based in reality, therefore, they're poor evidence that Bernie can win.
Bickering occurs between you two.
That specific statement in question is fairly certainly a result of her feelings like you are either not really grasping or not really taking into account the point that, not only will the GOP's attacks on Bernie be likely to be diverse and based in reality, amplifying their effectiveness much more than they would be effective on, well... Steyer, since she probably favored him in part because she considered him to be much less susceptible to such. Again, the certain future in that post was that Bernie is going to be attacked and those attacks could easily drop Bernie's numbers significantly... and, to add to that for why it matters more than for the rest, he is likely more vulnerable to those attacks than most of the others. That's bearing in mind that it's not even close to just socialism stuff, for that matter. There's the stuff like "Bernie's been on the right side of every issue all along!" being not as true as the people claiming it wish. In the last debate, I seem to recall him outright admitting such, incidentally. There's plenty more, as has been noted, but... there's a whole bunch of reasons why people vote for a Presidential candidate. Bernie's appeal is more emotional and idealistic, rather than pragmatic. He's selling big hope and change, albeit less explicitly than Obama (and without an actually viable way to get it to happen, unlike Warren). To pose a question to you, then, what happens to all those enticed voters if the relentless attacks on his perceived ability to bring that hope and change and be that great figure that he's being advertised as are poignant and reality-based? After all, the focus of such will be more to get people outside of Trump's base not to vote, rather than to get them to vote for Trump.
To be further clear, personally, I think that she's overemphasizing the effectiveness and length of the effect of the attacks, as well as minimizing how meaningful the current polls are a little too much, but... I also think that she's right to be concerned.
