Wrong! The trains (not trams) are also in heavily populated areas and have no problems with it. Look at Germany, Switzerland or France or even Japan, as example, before talking. If the trains will not run electrically in Israel, no need for it, as they will never be competitive timewise (and otherwise too).
U.S. confirms ISIS computer expert killed in air strike (Reuters)
from the article: Israeli train electrification plan may be scrapped due to radiation