Is what the Rafidah say—that Imam al-Bukhari is a fabricator [of hadith] and that he omits or inserts certain phrases, such as "blank here," "I forgot," or "so and so,"—a correct statement?

No attention should be paid to the words of the Rafidah due to their ignorance of Hadith and Sunnah, and their doubts are a distortion of words from their proper places.

Firstly: The Status of Sahih al-Bukhari: "Sahih al-Bukhari" acquired its status due to the testimony of the scholars of the Ummah regarding its authenticity. Imams have successively studied and approved it, and this has been affirmed by imams such as Ibn Hajar, Ibn Taymiyyah, and Ibn al-Qayyim. Therefore, the judgment on the authenticity of its hadiths is the judgment of the entire Ummah.

Secondly: The Rafidah are the Most Ignorant People in Hadith and its Sciences: The doubts of the Rafidah are evidence of their misguidance and ignorance of Hadith. They do not know its chain of narration (isnad) or its text (matn), and they transmit what conforms to their whims without knowledge. The examples mentioned in the question clarify their ignorance: 1. The Hadith of Thursday: The phrase "and he forgot the third" is from the words of one of the narrators in the chain (Ibn Uyaynah or Saeed bin Jubayr), and not Imam al-Bukhari, and this has been clarified by other narrations of the hadith. 2. The Hadith of Ali washing his face and feet: The phrase "and he mentioned his head and feet" is from the expression of Adam (al-Bukhari's shaykh), and not from the text of the hadith. The report clarifies the ablution of one who has not broken his ablution, and it does not contradict the description of the Prophet's ﷺ ablution. 3. The Hadith of Usamah bin Zayd: The ambiguity of the name of Uthman (may Allah be pleased with him) in some narrations of al-Bukhari does not change the meaning of the hadith. Muslim's narration clarified that it was Uthman, and al-Bukhari's ambiguity does not mean that he concealed something that bothered him, otherwise he would have concealed the entire hadith.

The Rafidah deliberately abandon clear evidence and cling to the ambiguous, interpreting it according to their whims, in fulfillment of Allah's saying: (As for those in whose hearts is deviation, they will follow that which is ambiguous from it, seeking discord and seeking its [wrong] interpretation) [Aal Imran (7)], and the Prophet's ﷺ saying: (So if you see those who follow what is ambiguous from it, then those are the ones whom Allah has named [as having deviation], so beware of them). The people of Hadith refer the ambiguous to the clear so that the texts agree and confirm each other.