Eli, a quick "Google" shows that you're quoting from a missionary website.    There is your answer.   The missionary claim that a singular person in Isaiah 53 was more widely believed than the idea that the servant in Isaiah 53 is the Jewish people (Israel) is simply false.  

Go back to early Christianity.  An early church father, Origen, in 248 CE, speaks of Jews telling him the servant was Israel and not the messiah. 
Now I remember that, on one occasion, at a disputation held with certain Jews, who were reckoned wise men, I quoted these prophecies; to which my Jewish opponent replied, that these predictions bore reference to the whole people, regarded as one individual, and as being in a state of dispersion and suffering, in order that many proselytes might be gained, on account of the dispersion of the Jews among numerous heathen nations."  Origen, Contra Celsum, Book 1.Chapter 55.
R Moshe Alshich lived from 1508-1593.  Origen, writing in 248 CE (over 1300 years earlier) said that Jews stated the servant was Israel. . .  the Jews.    

Most missionaries try to claim that Jews before Rashi said the servant in Isaiah 53 was the messiah and "Rashi changed it to the Jews."  

Well, based on that missionary claim (which is also false) Alshich lived 500 years after Rashi (1040 - 1105) supposedly changed the Jewish concept of the servant from the messiah to Israel.  If all of the Rabbis pre- R' Alshich thought the servant in servant was the messiah -- then please explain that Rashi said the servant was Israel 500 years before R' Alshich lived?   

Missionaries will grasp at any straws -- including ignoring the facts of all those sources pre-Alshich who say the servant is Israel.  Here are a few more:

Israel is the servant, all of which pre-date Rashi (who in turn pre-dates R' Alshich).

Brachot 5a
Eliyahu Rabbah (3 citations)
Yalkut Shimoni II 476
Bamidbar Rabbah chapter 13.2
Zohar (numerous places)
Kuzari, 
Poems by R. Shlomo Ibn Gavriel

Still think R' Alshich stated that all the Rabbis thought the servant in Isaiah 53 was "one man"?

The true issue at hand is -- could it possibly refer to Jesus.  The answer to that question is "no."  Jesus doesn't fit the servant as described by Isaiah.  Jesus did not live a long physical life. Jesus did not have physical children.  Jesus did not keep quiet -- there is very little in the description of the servant that applies to Jesus at all.   Missionaries simply ignore the bits that don't fit!

BTW -- Moses was not a messiah.  The term "messiah" means "anointed one" and Moses was not anointed.   Moses' brother, Aaron, was a messiah (anointed one) as was King David.    

The missionary claim that a singular person in Isaiah 53 was more widely believed than the idea that the servant in Isaiah 53 is the Jewish people (Israel) is simply false.   Origen (3rd century), Rashi (11th century). . . R' Shulman gives more references pre-Alshich who stated the servant was Israel:

Rabbi Yosef Kara ( c. 1065 – c. 1135) explains Isaiah 53 as referring to Israel.
 
Rabbi Abraham Ibn Ezra --  a 12th century Spanish Rabbi explains Isaiah 53 as referring to Israel.
 
Rabbi David Kimchi (the RaDaK)  lived in the 13th century and wrote that Isaiah 53 was about Israel.

Milhamoth ha-Shem (War of the Lord) is a 12th century work in which the Rav states that the servant in Isaiah 53 is Israel.

Rabbi Yeshaya m’Trani in the 13th century said the servant in Isaiah 53 is Israel.

Rabbi Shem Tov ibn Shaprut, 14th century also said the servant is Israel.

There are many more.  Yet another link for you.  

R' Moshe Shulman has an article about this often used personage by missionaries.  Read his article Rabbi Moshe Al Sheich and Isaiah 53.  Here is a snippet:
The Al Sheich is not approaching this as a literal commentary, but as a non-literal sermon. We cannot use what he says, no matter how interesting it is, to draw conclusions as to what the Rabbis think Isaiah 53 means.  Another proof (if we need it) that he is abandoning the literal meaning is that he quotes a famous Midrash and gives an interesting explanation:
 Our Rabbis say that of all the suffering which entered into the world, one third was for David and the fathers, one for the generation in exile, and one for the King Messiah. . .
he is explaining Isaiah 53, in the context of the Midrash dealing with suffering. He divides Isaiah 53 into three to correspond to the three divisions of the Midrash. The first part of the Midrash (David and the fathers) is 53:9-12 - Moshe. The second part (generation in exile) is 53:2-8 - the righteous of Israel. The third part (for the King Messiah) is 52:13-53:1 – the Messiah."

סופי

And everything that Sarah tells you, listen to her voice. Bereshit (Genesis) 21:12
Last Edited By: Sophiee1 Sat, 18-Oct-14 20:56:13. Edited 2 times.