Fadhl (Grace / Bounty) is only in Hands of Allah?
You will find Saudi backed Mullahs often quoting the following verse with great stress.
لِئَلَّا يَعْلَمَ أَهْلُ الْكِتَابِ أَلَّا يَقْدِرُونَ عَلَى شَيْءٍ مِّن فَضْلِ اللَّهِ وَأَنَّ الْفَضْلَ بِيَدِ اللَّهِ يُؤْتِيهِ مَن يَشَاء وَاللَّهُ ذُو الْفَضْلِ الْعَظِيمِ
[Yusufali 57:29] That the People of the Book may know that they have no power whatever over the Grace of Allah, that (His) Grace is (entirely) in His Hand, to bestow it on whomsoever He wills. For Allah is the Lord of Grace abounding.
By quoting these type of verses, they want to compare Ahl'ul -Sunnah , who believe that Rasool Allah (saw) has also been given the powers and authority to benefit us) to the Kuffar and Ahle-Kitab (Christians and Jews).
They try to prove that in the same way that the Kuffar and Ahle Kitab committed shirk by having such beliefs, we have likewise fallen into the quagmire of Shirk.
Sadly, by doing this, they completely neglect other parts of the Qur'an and Sunnah. See the following verses.
وَلَوْ أَنَّهُمْ رَضُوْاْ مَا آتَاهُمُ اللّهُ وَرَسُولُهُ وَقَالُواْ حَسْبُنَا اللّهُ سَيُؤْتِينَا اللّهُ مِن فَضْلِهِ وَرَسُولُهُ إِنَّا إِلَى اللّهِ رَاغِبُونَ
[Shakir 9:59] And if they were content with what Allah and His Messenger gave them, and had said: Allah is sufficient for us; Allah will soon give us (more) out of His grace and His Messenger too;
Is Allah himself committing shirk by saying that His Messenger can also GIVE to others along with Him?
يَحْلِفُونَ بِاللّهِ مَا قَالُواْ وَلَقَدْ قَالُواْ كَلِمَةَ الْكُفْرِ وَكَفَرُواْ بَعْدَ إِسْلاَمِهِمْ وَهَمُّواْ بِمَا لَمْ يَنَالُواْ وَمَا نَقَمُواْ إِلاَّ أَنْ أَغْنَاهُمُ اللّهُ وَرَسُولُهُ مِن فَضْلِهِ فَإِن يَتُوبُواْ يَكُ خَيْرًا
[Yusufali 9:74] They swear by Allah that they said nothing (evil), but indeed they uttered blasphemy, and they did it after accepting Islam; and they meditated a plot which they were unable to carry out: this revenge of theirs was (their) only return for the bounty (Fadhl) with which Allah and His Messenger had enriched them! If they repent, it will be best for them;
And do we really associate Rasool Allah [saw] as a Partner to Allah when we say that he [saw] can also ENRICH the others out of his Bounty (Fadhl) along with Allah?
Saudi backed Mullah's Tactics: Since all these kind of verses go directly against the self-invented definition of Shirk given by them, therefore, they are compelled to neglect and avoid them. They discourage the mentioning of these types of verses, because they fear that it will lead the people towards Shirk.