What are you talking about? Plenty of successful professional Jews made aliyah from former USSR. Only here all they could find was the unskilled labor jobs. Sounds like you don't live here. The dumbing down here doesn't come from immigrants - on the contrary in many cases. The decline in educational standards comes from the very top - obsessed with PC policies and leftist tendencies. This kind of decline doesn't happen overnight. It's years of neglect.
Knesset passes 'Norwegian Law' allowing ministers to resign their seats, remain in cabinet (Haaretz)
from the article: Technion chief: Science education in Israel on brink of collapse