Playing a Lolth-sworn Drow I actually sided with the "good guys" because Drow hate mindflayers and would never work with them, so despite not caring about the tieflings at all finding the healer was a priority.
your right your playing a loth sworn Drow. rest of your statement is about Gith
Just how exactly? They want to dominate the Underdark and Illithids are one of the main competitors.
Yes and they will work with mindflayers and everything else the have to achieve that goal. Even Rival Houses. I mean to edit it to add in that correctness of Drow hating mind flayers. Had to do dishes and smoke. Drow hate everything, including other Drow. Yet they will work with whoever is the most likely to help them achieve their goals. Including mind flayers, as is written in several Forgotten Realms books and are canon. House Beanre is the most known to do so, with Matron Beanre, and her daughter later doing so, as does the ArchWizard of Menzoberean. Drow society is chaotic ever changing, the lowest wants to rise up, the highest wants everyone else under their heel. In order to do that they will resort to any method, and make any temporary alliance.
Gith on the other hand will not work with Mind Flayers, they don't even let them speak before trying to kill them. Note there may be a few that will, but overall highly unlikely. And those that do are probably found and killed.
As for this whole evil thing, vs. good. You all are not playing evil characters, your playing neutral characters. Ones that are looking for reward, vs difficulty. That is not evil thats just lazy greed, which is neither good nor evil. You just want to better yourself and take the path with the least amount of hassle. Evil characters won't help goody goods on principal, oh sure they'd cut a deal to help the travelers then butcher every one of them in there sleep. Thats part of being evil, killing innocents, trying to take over, help a powerful ArchDruid who is a force in the area your in. Nope, cause now I have an opponent who's views counter mine, and I just made him stronger. Better to let him rot with the goblins, whose goals do align even if in small part with mine. What are your goals as an evil character to spread evil, either yours (much preferrred), or others. Because good will always come looking for you, fellow evil though you can make deals with, you can manipulate, control far easier then goody goods with their moral codes, and wanting to protect the innocent, blah.
