Is Eid al-Adha reallly necessary - I dont think so

Hey , no offense to my moslem  brothers but really lets face it, celebrating this day is no longer necessary , we serve the same God of Abraham  just that the Moslems do not believe that Jesus is the Messiah , Lord of  lords and King of kings. Therefore God is left out of the picture ,
again how did this come about,

God commanded Abraham to sacrifice his beloved son Isaac at a place called Moreh and I quote Gen 22.9

"When they came to the place of which God had told him, Abraham built the altar there and laid the wood in order and bound Isaac his son and laid him on the altar, on top of the wood. 10 Then Abraham reached out his hand and took the knife to slaughter his son. 11 But the angel of the Lord called to him from heaven and said, “Abraham, Abraham!” And he said, “Here am I.” 12 He said, “Do not lay your hand on the boy or do anything to him, for now I know that you fear God, seeing you have not withheld your son, your only son, from me.” 13 And Abraham lifted up his eyes and looked, and behold, behind him was a ram, caught in a thicket by his horns. And Abraham went and took the ram and offered it up as a burnt offering instead of his son. 14 So Abraham called the name of that place, “The Lord will provide”; [2] as it is said to this day, “On the mount of the Lord it shall be provided.” [3]

That is what happened but moslems believe the devil tried to stop Abraham and Abraham stond the devil 3 times a ritual still practised today but that wasnt mentioned.
Because Abraham didnt hold back his son God promised to Sacrifice his only son Son Jesus Christ and his death would remove all sin from all people, this happened in 33AD, Jesus was crucified died and rose again he went back to heaven to prepare a place for those who believe Him as Lord and Saviour and He pleads to God on our behalf every day.
Further moe Hebrews 8:10
¹⁰ This is the covenant I will establish with the people of Israel
   after that time, declares the Lord.
I will put my laws in their minds
   and write them on their hearts.
I will be their God,
   and they will be my people.
¹¹ No longer will they teach their neighbor,
   or say to one another, ‘Know the Lord,’
because they will all know me,
   from the least of them to the greatest.
¹² For I will forgive their wickedness
   and will remember their sins no more.”^[c]
And this is where I base my argument 
Christ died and paid the price for all mankind , He laid  the only foundation, no other foundation can be laid.
His blood is sufficient for all.

The Blood of Christ

 ¹¹ But when Christ came as high priest of the good things that are now already here,^[a] he went through the greater and more perfect tabernacle that is not made with human hands, that is to say, is not a part of this creation. ¹² He did not enter by means of the blood of goats and calves; but he entered the Most Holy Place once for all by his own blood, thus obtaining^[b] eternal redemption. ¹³ The blood of goats and bulls and the ashes of a heifer sprinkled on those who are ceremonially unclean sanctify them so that they are outwardly clean. ¹⁴ How much more, then, will the blood of Christ, who through the eternal Spirit offered himself unblemished to God, cleanse our consciences from acts that lead to death,^[c] so that we may serve the living God!