The church fathers quite often mention Matthew was translated from Hebrew.
Scholars seem to change their view on Hebrew vs Aramaic. The Dead Sea Scroll played a role in that.
Maybe Hebrew or Aramaic isn't even the most important question. They are sister languages and obviously closer than Greek.
Even the question in what language the original were written may not be the most important question.
It was long thought that the Greek texts were written by uneducated men and that's the reason it sounds so childish. "HS Greek", "Tired Greek" were names given to the NT.
Later it was named Koine Greek. It was really spoken during the time of Jesus. Jerusalem was on trading route..
More recent scholarship discovered something new. Just do a one one Greek to Hebrew translation and in most cases you get perfect Hebrew. Quite often with idioms.
So even if the very first manuscripts were penned down in Greek, they were just Hebrew thought patterns penned down in Greek.
So I personally don't care which language the originals were written in. I'm interested in the mindset of the writers.
There was a time I wanted to join a Messianic congregation until I found out they're just Jewish church folks.
I think not all Messianics are the same, just like not all Christians are the same.
My point is that I finally realized that I didn't need to be Jewish to follow Christ any more than any of Paul's converts from the nations.
That depends on how many of the OT laws you think Jesus did away. Besides that I think you at the very least need to understand Jewish thought.
Just a tiny example. Law in the Jewish mind is almost the total opposite of law in the Greek mind.
So my point isn't we should all because ultra Orthodox Jews but we likely understand Jesus better if we understand the ways of the Ultra Orthodox Jew.
Afterall Jesus was a Jewish man promoting a Jewish Book in a Jewish society...
About circumcision.... I know there are many views on that. Some even see many contradictions. I'll give you one short view as a consideration.
It all started with converted Jews only. Maybe a handful of Romans but mostly Jews. They just kept their daily routine and basically the only difference with the other Jews was that they believed the Messiah had come while other Jews are still waiting.
When Gentiles started pouring in they did not promote all sorts of OT laws for them. Circumcision is one of them. But they still held the view that the nation of the Jews was set apart. They wanted to honor God for keeping them safe during OT times.
So my point is simply: You can't fully understand the OT and NT without fully understanding the Jewish mind/culture.
Of course you are allowed to disagree with that like millions of others do