The ROSE in ancient times was akin to the LOTUS, which represented the SUN and CREATION, as well as ENLIGHTENMENT. In Buddhist doctrine as well as in ancient Egypt, the opened flower represented "creation through transformation" – a rebirth.
All humans can become enlightened. The Satanic cult wast rying to keep humans imprisoned in the dark.
It's also all intimately connected to the Second Coming of Christ (which the Satanists hoped would be the anti-christ).
These symbols are ancient and can be reclaimed from the Satanists for their universal truths and used for good.