Yes it´s true that 1st commandment may seem the same,they´re actually not though imo.
Who was it that God said he was,but the God of whom,"Abraham,Isaac,and Jacob",and
that is contrary to that what those of the Islamic faith believe,in their belief that he also is
the God of Ishmael.
Which no proof of that justification is nowhere to be found in the OT.
None whatsoever,
So if God himself says otherwise,Then who is it we should believe,God or man?.
And many of the early descendants of the Israelites who practiced what today is more
commonly known as the Jewish faith knew of this precious name,as I´m sure that it was
actually handed down to them throughout the generations.
But because of their later not being allowed to pronounce it out of fear it would/could be
blasphemed etc.,over time,the actual translation,or meaning of the letters YHWH were
simply lost and replaced by words like Elohim,Adonai,Zebaoth,etc.
Titles of respect,but not God´s actual name.
And if were it to be so,then Islam is guilty of worshipping and serving an entirely different
God other than the Israelites were to worship and serve by name.
As for a few other commandments that come to my immediate attention that contradict the
ones given to Moses by God himself,or written by the finger of God himself,yet are in deep
contrast to Islam´s teachings are for example.
When God says "thou shalt not commit adultery",how is then that the Islamic faith only says
it applies to women?.
And why I think that is because if the Koran says that a man is allowed to have as many as 3
wives,where in the case of adultery,is an actual case against him to be made?.
In other words,it doesn´t prohibit it,but actually goes against what God said and not only does it
condone it,but approves of it.
Or another one that grabs my attention is the one where it says "thou shalt not bear false witness
against another fellow man".
Yet in Islam you´re,if the circumstances were to deem it necessary to do so,permitted to.
Imo,people really need to know their scriptures.
And as for the NT,which is nothing more than books relating to Christ as being the actual Messiah,is
not only continuation of the OT,but also the promise and fulfillment of what was written in the OT.
For example,does the OT say that God has a Son?.
It sure does say that if you want to believe Proverbs 30:4.
It even speaks of God´s personal name in 83:18.
As in the OT,it speaks of the actual sufferings of this promised seed,or Messiah.
And in the NT,we are all warned in advance of false prophets rising up in the last days.
Maybe not by name,as the name of the Messiah also wasn´t known by his actual name,just Immanuel
etc.
Or the signs of the time of the end:
And if we can see them all happening in our day,who really is it that can argue against them?.
That is in fact arguing against God himself,and as any faith are aware of,that neither fares well,nor does
it end well.