Finding that just about every other leader within Genesis was against the party leaving the Sigil continent and heading back toward a place where a powerful undead was, was not at all a surprise.
Scylla wanted them to stay right where they were so that they could help lead the gathering forces. However, she slowly began to reconsider when she understood the strength of what they would face. Scylla was a general.
With that being said, she was able to easily convince a few others that gathering the right amount of information was the best option. Even under this potential time crunch. Losing the chance to be able to defeat a monster returning to power that could be worse than other already powerful was what her focus relied on.
This was because no one understood the real depth of what a vampire could do. The information was too unsupported nowadays. Especially since every culture that had some fairy tale of them was slightly different.