My question came from reading xmen16.
The way isca kept calling them soft and nice in other words weak To Mag and Xaiver. And her reaction to Humans still being in existence and thriving seem to only prove that point.
I don't see a Real reason for them to attack Wakanda for no other reason than just being a super power human nation who warrior like attitude matches them. I could see them wanting to see what was up with Wakanda.