Peace be on all.
1) Ahmadis go to Hajj from other than above mentioned countries. Those who are prevented consider:
""But we are not the only ones who were prevented from doing the Pilgrimage. Our beloved Holy Prophet, may peace and blessings of Allah be upon him, was also prevented from doing the Pilgrimage by the Quraish, so if we are in the same company as the Holy Prophet, may peace and blessings of Allah be upon him, then what blessed company that is.""
http://whyahmadi.org/objections-raised/why-do-ahmadis-not-perform-hajj.html
2) What are the main Articles of Faith (Eeman) in Islam?
"" The following are the main Articles of Faith in Islam (see Part 1.2):
1. To believe in Allah (One God)
2. To believe in all His Angels.
3. To believe in all His Books.
4. To believe in all His Prophets.
5. To believe in the Day of Resurrection. 6. To believe in the Decree of Allah""
Page 314
""There are five fundamental principles (or Pillars) of Islam ( see Part-1.3):
1. Declaration of Faith---the Kalimah
2. Observance of Salat.
3. Paying of Zakat.
4. Performance of Hajj (Pilgrimage) to Ka`bah
5. Observance of Saum (Fast) during Ramadan.""
Page 322
""The Hajj or Pilgrimage to Mecca is obligatory upon every such Muslim adult (at least once in his/her lifetime) who can afford to undertake the journey and has safe access to Mecca (3:98). The time appointed for the Hajj is fixed ten weeks after Eid-ul-Fitr. Thus it starts on the eighth and continues up to the twelfth of the lunar month of Dhul-Hijjah.""
Page 11
@
https://www.alislam.org/library/books/BasicsReligiousEducation.pdf
3) Mr. Abdul Hameed [brother of Ahmadiyya Muslim Professor Dr. Abdus Salam, great server of cause of science in third world countries AND , shared Nobel Laureate in Physics 1979 - for Unification theory, Unifying weak nuclear force and electromagnetic force ] writes in his book "World Renowned Scientist - Abdus Salam" describing the parents and elders of Prof. salam, he writes:
[translation and gist, pages 9, 23]
Elder brother of father of Prof. Salam studied among Ahle hadith sect.
Both bothers at various times made research and prayed to God and upon direct guidance became Ahmadiyya Muslim, and remained steadfast.
Uncle (the elder brother) was Inspector of Schools, after retirement he went for Hajj. No news came for months, family was anxious....One day he returned silently. Relatives complained that they should have been told earlier to arrange welcome. Uncle said he did not like publicity, I performed Hajj for the sake of Allah.
When he was asked for such a delay, he said that Sultan Abdul Aziz ibne Sa'ud was told that he is a scholar and knows many languages including English. He was given some books to translate in English. Thus he could not come back before finishing the work.
Then the Uncle said, he drew attention of Sultan that there is oil in the land of Hijaz, according to the Hadith:
لا تقوم الساعة حتى تخرج نار من ارض الحجاز تضي ء اعناق الابل ببصرى
Bukhari, Muslim
(The Hour will not be established until a fire will emerge from land of Hijaz, it will enlighten necks of camels till Basra.)
Thus Sultan Abdul Aziz Ibne Saud made an agreement with
The Saudi Arabian Mining Syndicate Ltd Incorporated in England.
And oil was discovered in land of Hijaz.
By this discovery, our Uncle showed the way to Sultan. Uncle was great scholar of Holy Quran. He was shown visions. He saw Holy Prophet (peace and blessings of Allah be on him) in dream several times.
That was an Ahmadiyya-Muslim heart and mind!
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Abdus Salam has been mentioned above:
https://en.wikipedia.org/wiki/Abdus_Salam
http://www.alislam.org/gallery2/v/a/salam/