If the validity of a Russian passport is less than 6 months, then you can enter Russia. Return to Israel by Russian passports will not work.

According to the border rules of the State of Israel, to enter the territory of the State of Israel, the Russian the tourist must have a passport valid for at least 6 months from the date of entry.

There are cases when Israeli border guards turn a blind eye to the validity of the passport. But no guarantee, the more so in your case, no one will give.