There are many reasons for strong ties between Israel and South Sudan. Some are obvious, some are not. There's also no parallel between Palestinians who have a conflict with Israel, and South Sudan which does not. IF you weren't a hypocrite I assume you'd say the same for Turkey, Iran, Syria and Iraq for not accepting Kurdistan and Turkey for also not leaving Northern Cyprus. But you are, aren't you?
U.S. Defense Secretary Carter: Russia escalating Syria war by targeting moderates (Reuters)
from the article: Israel announces full diplomatic ties with South Sudan