It's really vague, and does warrant some specific examples..

I'd say if anything, they pretend some things are more peaceful than they are. Like sending the military in to capture a foreign leader being portrayed as simply "a military operation" rather than "act of war". Emphasizing celebrations by Venezulan ex-pats.

The nominally socialist nations that receive media attention are generally truly not particularly peaceful, and the socialist nations that are pretty good peace wise are well known, but just too 'boring' to be in a 'news' cycle.

I suppose the point is that people can't just take someone's declaration of 'socialism' at face value, as there's too many examples of malicious authoritarianism that claimed affinity to socialism as part of their rise to power. Not to say that capitalist nations are faring any better, just that the word 'socialism' when wielded as a brand isn't to be trusted.