When Guru Nanak got revelation his very first words were, “there is no hindu, there is no Muslim”. When a hindu and a Muslim asked which one is on the right path, Guru Nanak replied, “without good deeds and without good karma both will be lost”. As per Sikhism, “God exists from beginning, and now, and will exist eternally” Sikhism rejects science and scientific proves because then that would put God before science to prove, God is experienced through oneself, through praises, singing glories, mediating on him which 100% agrees ok Sufism. All the 10 gurus have several incidents in history, let’s take one and analyze:
Two Muslims came to Guru Nanak and asked him to join with him to offer namaz to God, Guru Nanak agreed and went with them to offer prayer but Guru Nanak totally prayed in opposite direction. The two Muslims asked why didn’t you pray towards God’s house? Guru Nanak replied my gods house is in every direction, to the north, to the east, to the west to the south, everything belongs to him.
The list is long of several incidents it’s best to talk with Granthi.
Muslims do not believe it to be the literal house of God. We also believe everything belongs to Him. We face the Qibla during praying because it was commanded to us but, it's also unique because all Muslims around the world do it. There is more unity in it. If you go to a congregation and everyone is facing their own direction, it would look unorganized and rather silly to be honest.