What was the Rav’s opinion of Yom Ha’atzmaut celebrations?
The Rabbi was not a fan (like many of the old school Rabbanim that predated the Medinah)
So he didn’t recognize it at all.
Say Tachanun. Don’t say Hallel. Don’t say any special Tefillot.
Correct?
That’s right
was he anti zionism [like satmar] or thought is was too secular?
No not Satmar at all. If I understood correctly, the Rabbi viewed it as a secular thing.