What is the scholarly response to Christians' claims that the Prophet, may Allah bless him and grant him peace, used to suck the tongues of Al-Hasan, Al-Husayn, and Fatimah, citing hadiths to that effect?

Biographical books narrate that the Prophet (peace be upon him) sucked the tongue of Al-Hasan, and this was narrated by Ahmad. The Prophet (peace be upon him) also sucked the tongue of Ali, as mentioned in Al-Sirah Al-Halabiyyah. It is also mentioned that the Prophet (peace be upon him) kissed his daughter Fatimah.

The first and third narrations are authentic, whereas the story of Ali is not authentically attributed. There is no problem with these hadiths. Some hateful individuals have exploited these hadiths to defame the Prophet (peace be upon him), while the Ahl Al-Sunnah consider them among the virtues of the Prophet (peace be upon him).