Which hadith? please post it here for us to see.
1.Sahih Muslim, English reference : Book 31, Hadith 5955:
' A'isha reported that Allah's Apostle (sawaws) went out one morning wearing a striped cloak of the black camel's hair, then came Husayn and he wrapped him under it along with the other one (Imam Hasan). Then came Fatima and he took her under it, then came Ali and he also took him under it and then said:
"
Allah only desires to repel all impurity from you, O Ahl al-Bayt, and purify you with a thorough purification.( holy Quran, Sura Al-Ahzab, verse 33 )
"
2.Sahih Muslim, USC-MSA web (English) reference: Book 31, Hadith 5923
Allah's Messenger (pbuh) said: Behold, for I am leaving amongst you two weighty things, one of which is the Book of Allah, the Exalted and Glorious, and that is the rope of Allah. He who holds it fast would be on right guidance and he who abandons it would be in error [and the other is my Ahlul Bayt], and in this (hadith) these words are also found: We said: Who are amongst the members of the household(Ahlul Bayt)?
Aren't the wives (of the Holy Prophet) included amongst the members of his household(Ahlul Bayt)?
Thereupon he said: No, by Allah."
So because the wives of Prophet Muhammad were not between Ahlul Bayt, that part of the verse 33 of Chapter 3 which is about Ahlul Bayt and is between the other verses which are about the wives of Rasulallah, is not relative to the other verses and has been revealed separately.
3.Jami' at-Tirmidhi, English reference : Vol. 5, Book 44, Hadith 3205
Narrated 'Umar bin Abi Salamah - the step-son of the Prophet (S):
"
When these Ayat were revealed to the Prophet (S): 'Allah only wishes to remove the Rijs from you, O Ahlul Bayt, and to purify you with a thorough purification' (33:33) in the home of Umm Salamah,
he called for Fatimah, Hasan, Husain, and wrapped him in the cloak, then he said: 'O Allah! These are my Ahlul Byt [the people of my house], so remove the Rijs from them, and purify them with a thorough purification.' So Umm Salamah said: 'And am I with them O Messenger of Allah?' He said: 'You are in your place [as my wife, not my Ahlul Bayt], and you are upon good.'"
Grade of this Hadith is Sahih and then it is authentic. See,
http://sunnah.com/urn/736700
So that part of the verse 33:3 has been revealed only for special members of the family of Prophet and is only about Ahlul Bayt. Also, according to this part of the tradition,i.e. "
When these Ayat were revealed to the Prophet (S): 'Allah only wishes to repel the Rijs from you, O Ahlul Bayt, and to purify you with a thorough purification' in the home of Umm Salamah,
he called for Fatimah, Hasan, Husain, and wrapped him in the cloak, then he said: 'O Allah! These are my Ahlul Byt ",
This part of the verse has been revealed sepratly and is not about the wives of the Prophet.
Can a Muslim connect to God directly or he/she need to reach him through Ahl Albait?
1.Holy Qur'an, 5:35
O you who have faith! Be wary of Allah, and
seek the means to Him, and wage jihad in His way, so that you may be felicitous.
So, we need some means to Allah. Good doings are examples of these means. Also there are other examples,
2. Holy Qur'an, 25:57
Say[O Muhammad], ‘
I do not ask you any reward for it[ i.e., my Risalah ], except that anyone who wishes should take the way to his Lord.’
So, paying the rewrad of Prophet, is another way to Allah.
But what is our reward for the Risalah of Prophet to him?
Holy Qur'an, 42:23
Such is the good news that Allah gives to His servants who have faith and do righteous deeds!
Say[O Muhammad], ‘I do not ask you any reward for it except the love of [my] relatives.’
According to Hadiths and saying of greatest Sunni Mufaseers, the relatives of Prophet are his Ahlul Bayt,
Zamakhshari in his Tafseer i.e. Kashshaf has said a Hadith and said also this verse is only for Ahlul Bayt.(Al-Kashshaf, vol. 4, pg. 220)
It has been narrated in Sunni books that Imam Hasan after the martirdom of Imam Ali, declared a Khotbah in which he(peace be upon him) said,
Source,
Majma'uz Zawa'id, 9/146
وَ أَنَا مِنْ أَهْلِ الْبَيْتِ الَّذِينَ أَذْهَبَ اللَّهُ عَنْهُمُ الرِّجْسَ وَ طَهَّرَهُمْ تَطْهِيراً وَ أَنَا مِنْ أَهْلِ الْبَيْتِ الَّذِينَ افْتَرَضَ اللَّهُ تَعَالَى وَلَايَتَهُمْ وَ مَوَدَّتَهُمْ فَقَالَ فِيمَا أُنْزِلَ عَلَى مُحَمَّدٍ قُلْ لا أَسْئَلُكُمْ عَلَيْهِ أَجْراً إِلَّا الْمَوَدَّةَ فِي الْقُرْبى
And I am from Ahlul Bayt those whom Allah has repeled all impurity from them and purified them with a thorough purification. And I am between the Ahlul Bayt those whom Allah Ta'ala has obligated their leadership and love. For us has revealed to Muhammad(peace be upon him and his Ahlul Bayt) that, "Say[O Muhammad], ‘I do not ask you any reward for it except the love of [my] relatives."
The author of the book, ie al-Haythami, after narration of this tradition say,
وإسناد أحمد ، وبعض طرق البزار ، والطبراني في الكبير ، حسان
The chain of the narration of 'Ahmad, and some of the routs of the narrators of the al-Bazzaz and al-Tabarani in al-Kabir
are Hasan[ie,authentic].
See
here.
So one the ways to Allah, is the loving of Ahlul Bayt.