Leaders of Die Linke tried to pass a resolution expressing their unconditional support for Israel. When delegates at a Berlin party congress objected, some members stormed out in protest. Now the right-wing press is attacking Palestinians and Trotskyists inside the party.
In my amateur political opinion, unless Die Linke seriously purges the reformist and squishier elements represented by the likes of Klaus Lederer
I think they'll be perennially unpopular, caught between what should be their radical roots and the nascent liberalism infiltrating the party.
I skimmed their party program and the biggest impression I get is that it's soft and non explicit in their goal to eliminate capitalism, much reformist talk and none of revolution or workers' democracy. Let's be clear : at this current political moment, this rhetoric sucks ass and does nothing to galvanise workers. It's unfortunate that Wagenknecht is sorta beating them to the punch on this kind of transformation albeit I don't think she is a radical, maybe more chauvinist from what I've heard.
As an aside, personally I've always hated the branding of "democratic" socialism. I understand why socialists thought they had to use it but to me socialism is already the democratic choice, it brings democracy to the site of production not just government elections. To use democratic socialism seems redundant at best and cowardly at worst.