There are multiple Hadith about the beginning of the journey of Meraj, on whose basis people are rejecting the journey of Meraj altogether. The Muhaddithin (Hadith-Experts) have mentioned all these Hadith and have reconciled (Tatbeeq) all these Hadith. The interpreter of Sahih Bukhari, Imam Badruddin Aini (May Allah shower His Mercy on him) has written: About "Bad Ul Khalq" (A chapter in Sahih Bukhari), it is given: I was in the Ka'aba. Imam Zuhri (May Allah shower His Mercy on him) has narrated on the authority of Hadhrat Anas and Hadhrat Abuzar (May Allah be well pleased with them): The roof of My house split while I was in Makkah Mukarrama. It is given in the Hadith narrated by Waqidi that the Holy Prophet (Sallallahu alaihi wa sallam) was taken from the gorge of Abu Talib (shi'b e Abu Talib) and it is given in Mojam Tabarani that the Holy Prophet (Sallallahu alaihi wa sallam) was in the house of Hadhrat Umme Hani (May Allah be well pleased with her) and she woke up in the night and did not find the Holy Prophet (Sallallahu alaihi wa sallam).
All these diverse Hadith are reconciled like this: The Holy Prophet (Sallallahu alaihi wa sallam) was in the house of Hadhrat Umme Hani (May Allah be well pleased with her), which was in the gorge of Abu Talib. For this reason, the Holy Prophet (Sallallahu alaihi wa sallam) described the house as His house and said: …the roof of My house split. From the roof an angel descended and was in the service of the Holy Prophet (Sallallahu alaihi wa sallam) from there to the Masjid Haraam. Then the Holy Prophet (Sallallahu alaihi wa sallam) rested in the Masjid Haraam and then the angel was in the service of the Holy Prophet (Sallallahu alaihi wa sallam) through the door of the Masjid where the Holy Prophet (Sallallahu alaihi wa sallam) mounted the Buraq. (Umdatul Qari Bab Ul Meraj).
That Hadhrat Umme Hani (May Allah be well pleased with her) was not a Muslim does not affect the authenticity of the journey, as in Makkah the command to break all relations with the non-Muslims and it is not mentioned anywhere about Hadhrat Umme Hani (May Allah be well pleased with her) that she had committed any form of Shirk. The Holy Prophet (Sallallahu alaihi wa sallam) would go to her house to turn her to Islam and it is because of the blessings of these visits that she turned a Muslim.
In the narration of Hadith, every criticism is not to be accepted and every Dhaif (weakly-authenticated) Hadith is not unworthy of consideration. The Hadith of Hadhrat Umme Hani (May Allah be well pleased with her) is present in Mojam Kabeer of Imam Tabarani.
The interpreters of Sahih Bukhari, the Imams Hadhrat Badruddin Aini Hanafi and Hadhrat Ibn Hajr Asqalani (May Allah shower His Mercy on them) would not have reconciled this Hadith with others if this Hadith was not to be considered. They would have simply said that this Hadith is Dhaif. The word and opinion of these Imams of Hadith carries much weight.