Eastbury wrote:My native language is Arabic. However, after doing some research on the subject, I believe that the origin of Arabic language and the scriptural Hebrew language is very similar
They both come from an undocumented language that is called Proto-Semitic by scholars.
A third example is the letter ( ח ) which is the equivalent of [خ]. Fortunately, this letter exists in other languages as well such as Spanish, German, UK and Irish Gaelic, etc. If it happens that you know the singer Julio Iglesias, this phonic exists in the first letter of his first name (julio), pronounced by Spanish people (Europeans don't know how to pronounce his name at all).
It's actually the equivalent of <ح> and that's how it was once pronounced. The pronunciation like <خ> is more recent.
Arabic as it's spoken today is just a continuation of a more ancient root such as Aramaic, Amharic, classic Hebrew, etc. These languages were truly one language with different dialects but are perceived nowadays to be different in essence because of political and religious reasons.
Arabic and Hebrew are not mutually intelligible, are they? I doubt they were even in ancient times. For comparison, English and Dutch come from the same proto-language and have a lot of similarities but nobody considers them dialects of one language.