Did you just hear it by reading the old posts in this thread? It was written almost 6 years ago.
You say it’s a silly holiday, yet many Rabbonim celebrate it. R’ Ovadia Yosef zt”l said Hallel on it. R’ Schachter shlita gives a psaht as to why it can be considered a Yom Tov, similar to Purim.
Mods, do you allow links to YUTorah? If so, here’s a link to a great article that examines this question from both sides (it includes the views of the Satmar Rebbe in it as well as those supporting a Jewish State.)
http://www.yutorah.org/togo/haatzmaut/articles/Yom_Haatzmaut_To-Go_-_5770_Rabbi_Ozerowski.pdf
PLEASE DON’T CONCOCT THINGS IN THE NAME OF POSKIM. RAV OVADIA SAID TO RECITE HALLEL WITHOUT A BRACHA – WHICH IS SIMPLY RECITING PRAKIM OF TEHILLIM. THAT IS A HUGE DIFFERENCE. Rav Ovadia Yosef (Teshuvos Yabia Omer 6:O.C. 41)
AND WHY NOT QUOTE FROM THE LINK THAT YOU YOURSELF POSTED INSTEAD OF YOUR OWN THOUGHTS? HERE IT IS:
R. Ovadia Yosef (ad loc.) argues that even an atchalta d’geulah is not sufficient to warrant reciting Hallel with a berachah on Yom Haatzmaut, since there are still numerous challenges and troubles in Israel. Although it is possible R.Ovadia would distinguish between Hallel and the other characteristics of establishing a Yom Tov, it is clear that he feels this type of atchalta d’geulah is not strong enough at least regarding certain aspects of such a chag. He bases this on the Yerushalmi (Pesachim 10:6) that says although one should indeed recite praises (“shirah”) to Hashem when He does miracles for you, this does not apply to “techilat geulatan,” such as the night they left Egypt (as opposed to after crossing the sea).37 Also, it is worthwhile to note (as does R. Goren in passing) that we don’t have records of a specific day of Yom Tov for the return of Jews to Israel in the time of Ezra, so too here one could argue that atchalta d’geulah alone would not warrant a designation of Yom Tov.