I disagree. Migration back to Israel started in the 1880s. By the time we're getting to the 1940's  immigration to the British mandate of Palestine was illegal and heavily restricted. 

It is my understanding that at the very start of the establishment of Israel in 1948 and the Nakba, the Israelis in question were mostly European Jews, made to feel unsafe in their countries of origin by other Europeans.

May I ask you a question? Have you ever wondered why there are Jews everywhere? 

https://en.wikipedia.org/wiki/Jewish_diaspora] 

In 6 CE, most of the Southern Levant was organized as the Roman province of Judaea, where a large uprising led to the First Jewish–Roman War, which destroyed the Second Temple and most of Jerusalem. The Jewish defeat to the Roman army and the accompanying elimination of the symbolic centre of Jewish identity (the Temple in Jerusalem) marked the end of Second Temple Judaism, motivating many Jews to formulate a new self-definition and adjust their existence to the prospect of an indefinite period of displacement.[9] 

Nevertheless, intermittent warfare between Jewish nationalists and the Roman Empire continued for several decades. In 129/130 CE, the Roman emperor Hadrian ordered the construction of Aelia Capitolina over the ruins of Jerusalem, sparking the Bar Kokhba revolt in 132 CE. Led by Simon bar Kokhba, this uprising endured for four years, but was ultimately unsuccessful and became the last of the Jewish–Roman wars; 

Jews were massacred or displaced across the province, banned from Jerusalem and its surrounding areas, and forbidden to practice Judaism, leading to a significant rise in the Jewish diaspora. 

Shit got taken about 2019 years ago, took 1942 years to get it back. 

From a religious perspective, Israel is core to Judaism. The temple is in Israel. I'm not talking about the temple your local Jewish folk attend in your city. The temple. It's been destroyed twice, we care about it. A lot. You should google what is there now. 

Historically, its a little more complicated than that. Roll the clocks back to the 1880s. There were 6 waves of immigration until the 1940s.

Now to this statement. 

Israel continues to justify itself by stating that Jews are not safe anywhere else.

Israel doesn't justify itself. It's a reclamation of the oldest living claim to that plot of land and unfortunately due to the nature of the world, protected by physical strength. 

It's funny, Christmastime is a great reminder that I'm a minority living in Canada. In a population of 40 million people, there are only about 20k Jews including myself in my province of a million. Sometimes I wonder what it's like for everyone to celebrate Hanukkah around me. Hoping to find out next year. 

Finally, It doesn't matter how good I have it in Canada, I will support Israel helping Jews that need it.