Furry Bug that swarms only certain plant
As indicated in @KarlKjer 's comment, this insect is a Pseudococcidae, or commonly known as Mealybugs. The exact species is difficult to find due to picture quality.

Mealybugs are insects in the family Pseudococcidae, unarmored scale insects found in moist, warm climates. Many species are considered pests as they feed on plant juices of greenhouse plants, house plants and subtropical trees and also act as a vector for several plant diseases.
Mealybugs occur in all parts of the world. Most occur naturally only in warmer parts, and get introduced into greenhouses and other buildings in cooler countries. It is unlikely that any live in the Arctic or Antarctic, except perhaps in buildings.

Considering that Mealybugs are found basically anywhere on Earth, it's not a surprise to have found them in Israel.