Praise be to Allah.
The stories which this preacher told are all false and are lies against the Prophet (peace and blessings of Allah be upon him) that have no basis. He did not mourn after the death of Khadeejah (may Allah be pleased with her), or slaughter a camel, or invite the people to mourn, as some people do nowadays. He used to make a lot of du’a (supplication) for Khadeejah (may Allah be pleased with her), and sometimes he would slaughter a sheep and distribute the meat among her friends as a gift and act of kindness, and he would pray for her and be kind to her by means of this du’a.
Similarly, what he said about the tree is also false and has no basis, and what he said about the Jew is all lies, like the lies made up by the evil fabricators. The same applies to what he narrated about ‘Uthman (may Allah be pleased with him) and that man. Moreover Qatadah was not a Sahabi (Companion of the Prophet), rather he was a Tabi’i (Successor).
The point is that these four reports are all false and are not sound at all, But it was narrated in other, saheeh hadeeths (authentic narrations) that the Prophet (peace and blessings of Allah be upon him) called some trees and they came to him– and that was one of the signs of Prophethood. This story was proven in Saheeh Muslim, where it says that on one of his journeys he wanted to relieve himself, so he called two trees and they came together, and he sat between them to relieve himself, then each tree went back to its place. This was a sign from Allah that was evidence of His almighty power, and that he says to a thing “Be!” and it is. This was also a sign of the truth of the Messenger of Allah and that he was indeed the Messenger of Allah. This is something other than the story that this liar told. We must beware of these liars, and the preacher must fear Allah when he preaches to people; he should remind them of things that will benefit them in their spiritual and worldly affairs of verses of the Quran and saheeh hadeeths from the Prophet (peace and blessings of Allah be upon him). That is sufficient. It was narrated in a saheeh hadeeth that the Messenger of Allah (peace and blessings of Allah be upon him) said: “Whoever narrates a hadeeth from me knowing that it is false, he is one of the liars.” (Narrated by Muslim in his Saheeh). And he (peace and blessings of Allah be upon him) said: “Whoever narrated from me something that I did not say, let him take his place in Hell.” (Saheeh, agreed upon). And there are many similar hadeeths.