(6) is misleading; the president of PP (the party of the central government) in Catalonia has himself asked for a secret vote recently[1], hoping for defections in the pro-independence groups. Yet a few hours later he calls them cowards for having a secret vote.

[1] https://twitter.com/elsmatins/status/923815123260772357 (you'll notice it was retweeted by Albiol himself)