They do the thing where they acknowledge mistakes of past socialism, but don't completely blow those mistakes out of proportion and uphold the historical socialist project as a whole. It's refreshing to read when you're mostly exposed to western opinions where the majority of people feel compelled to disavow every socialist project and believe all of the most outrageous propaganda points, and in response to that the largest group of people upholding historical/existing socialism are the ones that deny that any mistakes occurred at all.