What you say is completely baseless and untrue. Of course one can be united with God, even if the rest of mankind chooses to turn their back to God. What have others to do with our own individual Spiritual journey? I really do not know how you can believe such things.
"For God so loved the world . . ."
"XXXV. Ponder a while. What is it that prompted, in every Dispensation, the peoples of the earth to shun the Manifestation of the All-Merciful? What could have impelled them to turn away from Him and to challenge His authority? Were men to meditate on these words which have flowed from the Pen of the Divine Ordainer, they would, one and all, hasten to embrace the truth of this God-given, and ever-enduring Revelation, and would testify to that which He Himself hath solemnly affirmed. It is the veil of idle imaginations which, in the days of the Manifestations of the Unity of God and the Day Springs of His everlasting glory, hath intervened, and will continue to intervene, between them and the rest of mankind. For in those days, He Who is the Eternal Truth manifesteth Himself in conformity with that which He Himself hath purposed, and not according to the desires and expectations of men. Even as He hath revealed: "So oft, then, as an Apostle cometh to you with that which your souls desire not, do ye swell with pride, and treat some as impostors, and slay others."
(Baha'u'llah, Gleanings from the Writings of Baha'u'llah, p. 82)
"2. And verily this Brotherhood of yours is a single Brotherhood, and I am your Lord and Cherisher: therefore fear Me (and no other).
53. But people have cut off their affair (of unity), between them, into sects: each party rejoices in that which is with itself.
54. But leave them in their confused ignorance for a time.
55. Do they think that because We have granted them abundance of wealth and sons,
56. We would hasten them on in every good? Nay, they do not understand.
57. Verily those who live in awe for fear of their Lord;
58. Those who believe in the Signs of their Lord;
59. Those who join not (in worship) partners with their Lord;
60. And those who dispense their charity with their hearts full of fear, because they will return to their Lord -- "
Qur'an, Surah 23, Yusuf Ali
"1. Unity of heart, and unity of mind, freedom from hatred, do I procure for you. Do ye take delight in one another, as a cow in her (new-) born calf!
2. The son shall be devoted to his father, be of the same mind with his mother; the wife shall speak honied, sweet, words to her husband!
3. The brother shall not hate the brother, and the sister not the sister! Harmonious, devoted to the same purpose, speak ye words in kindly spirit!"
(Vedas, Atharva Veda)
"133,1 A Song of Ascents; of David. {N}
Behold, how good and how pleasant it is for brethren to dwell together in unity!
133,2 It is like the precious oil upon the head, {N}
coming down upon the beard; even Aaron's beard, {N}
that cometh down upon the collar of his garments;
133,3 Like the dew of Hermon, that cometh down upon the mountains of Zion; {N}
for there the LORD commanded the blessing, {N}
even life for ever. {P}"
(Kesuvim (Writings), Tehillim (Psalms))
"68. O CHILDREN OF MEN!
Know ye not why We created you all from the same dust? That no one should exalt himself over the other. Ponder at all times in your hearts how ye were created. Since We have created you all from one same substance it is incumbent on you to be even as one soul, to walk with the same feet, eat with the same mouth and dwell in the same land, that from your inmost being, by your deeds and actions, the signs of oneness and the essence of detachment may be made manifest. Such is My counsel to you, O concourse of light! Heed ye this counsel that ye may obtain the fruit of holiness from the tree of wondrous glory."
(Baha'u'llah, The Arabic Hidden Words)
Regards,
Scott