Of course, they care. Look at the way they're behaving. If they didn't, they wouldn't be posting. What if they're actually a good team this season (pipe dream, I know)? Would they still laugh? Or would they say, "We should be the ones enjoying this team. **** LA fans!"
And aren't they trolling themselves? It would be unjustified if you called my responses to them trolling. LA Rams fan base here on HF is still in its infancy so Stl fans feel so comfortable talking **** about the Rams. I'll stop if they stop. Fair? I'd say so! I'll pick my spots anyway. I won't respond to them all the time.
FYI most people in St. Louis care more about Kroenke failing than anything else. Personally I don't give a **** about the Rams, haven't in quite some time. Because they suck and have for the last 10+ years. But I do care about things not working out for Kroenke, who ****ed over tens of thousands of St. Louisans who actually did care about the Rams, and continued to trash our city all the way through the whole process.