I'm afraid you are in error to associate the word Islam with the word Salem or Jerusalem.
The word Islam is Arabic and describes the religion that came seven centuries after Christ.
It means to place yourself in submission to another.
It has no ties to Jerusalem as does the Hebrew word Salem, which was recorded several thousand years before the word Islam came into existence.
In Arabic, Islām from the root 'slm' (silm), to be in peaceful submission; to surrender; to obey; peace; Islam literally meaning "The active willful surrender, submission, obedience, in purity to the will of another (Allah) in complete peace." (understood as submission to God) and is described as a dīn, meaning "way of life" and/or "religion." Etymologically, it is derived from the same root as, for example, Salām meaning "peace" (also a common salutation).
Salem is Hebrew and means peaceful.
Strong's Greek and Hebrew Definitions
שׁלם shâlêm shaw-lame'
The same as H8003; peaceful; Shalem, an early name of Jerusalem: - Salem.
Good post. The kind that makes one proud of FR.
I believe you are sadly mistaken. Hebrew, Aramaic, Syro-Aramaic, Arabic and some other languages in the Middle East are exceedingly closely related, and they do share words.
Even English shares words with Arabic.