4. Arabic calligraphy
Yes, it is beautiful, but so is Chinese calligraphy.
Arabic might be the best and most beautiful language for you personally, but please be aware that this is not an objective judgement and other languages are beautiful and unique in their own way and there is no language that is objectively the best, most beautiful or most unique.
Sorry, but I don't understand, everything you write. I find it a bit confusing. Especially the part about the expressions. It still looks like automatic translation.
1. Arabic is a sacred language
Yes, it is for Muslims, but other religions have other sacred languages like Hebrew, Tamil, Sanskrit etc, so I understand the religious and emotional value of Arabic for Muslims, but non-Muslims just don't feel the same.
2. Arabic is an ancient language still understood nowadays
Yes, it is, but there are several others as well. I learnt Latin and Ancient Greek at school, Tamil, Sanskrit, Classical Chinese and other ancient languages are also still understood and/or in use nowadays, and several of them have a longer history than Arabic.
3. Arabic phonetics
I don't see the point, why the fact that Arabic has some sounds that don't exist in other languages, makes it superior. Most languages have sounds that do not exist in other languages. Thai, Vietnamese and Chinese are tonal languages. That just makes the languages different, but there is no better or worse judgement in phonetics.
What does "Balassabp" mean?
In your Arabic message you write, that Arabic has many features that don't exist in other languages. What are they exactly? I am still a beginner in Arabic and so far I only know this:
1. The script
The Arabic script is a different writing system than the Latin alphabet, but it is not only used for Arabic, but also Farsi, Malay, Uyghur and several others. It is written from write to left like Hebrew and Syriac. And it is just one of an abundance of writing systems in the world like Thai, Tigrinya, Hangul and so on. IMHO the Chinese and Japanese writing systems are the most difficult, because they use thousands of individual characters and the Japanese mix four different writing systems.
2. The grammar
The Arabic grammar differs greatly from Indo-European languages, but it is similar to the other semitic languages. For instance Arabic has triliteral roots like k-t-b, but this grammatical aspect also exists in other Semitic languages like Hebrew, Syriac and Tigrinya:
katabtu كتبت vs. kāṯaḇti כתבתי "I wrote"
Especially if you are not good at English yet, you should strive to improve and try to write as clearly as possible. So please use punctuation marks, because otherwise you can easily be misunderstood. For instance you claim, that Arabic is one of the hardest languages in the world, but on the other hand it is not difficult to learn. That seems a bit contradictory to me.
To a native speaker, the own language is always beautiful (because he knows its richness) and easy (because he mastered it as a child), but I don't think it is objectively possible to judge, if a language is "the best" or "difficult/easy". If a language is perceived difficult or easy depends on the mother tongue and previous language learning experience of a learner.
What would be objective criteria to judge, if a language is "better" than others? All languages are good for their speakers, because they make communication between people possible and are treasures of their respective cultures.