No doubt some are sincere, but overall it's a good example of what might be called entrepreneurial nationalism
Yes, for sure, the people connected with JxCat are very much a business elite who only really embraced the independence movement when it suited them, although it's interesting that in the last Catalan election, they deliberately chose to go with people connected with Puigdemont and independents rather than time-served politicians. But what I find interesting is the rise of the ERC, especially as they were the ones that facilitated Sanchez's nomination. They're much more committed to (wider) Catalan nationalism than JxCat, yet they wisely returned Sanchez to power. The question for me is what Sanchez can give them - anything less than what was on offer in 2006 is clearly unacceptable, yet keeping Sanchez in power for nothing (while Catalan leaders sit in jail) is unacceptable too.
What strikes me about Catalan nationalism is just how much hatred comes from supporters of Vox and the PP - they don't seem to understand that making all these threats towards Catalans is doing nothing but pushing people away from them. It was the same mistake that the Serbs made in 1990/1, after all.
I don't think the issue of Catalan nationalism is going to go away anytime soon, particularly with the second generation now growing up with Catalan as the language of education. One option right now would be to allow the independence vote, as a moderate Sanchez government has a good chance of winning.