Praise be to Allah, the Lord of the Worlds; and may His blessings and peace be upon our Prophet Muhammad and upon all his Family and Companions.
First of all we would like to thank the brother for his zeal about the religion of Allah in a time and in a country where the people who are zealous about their religion are but few.
As regards Rashad Khalifa, he was an Egyptian chemist who used to live in
At last he was killed in
The brother asking the question knows that it is not easy to eradicate the sites of this man. However, we advise the brother to endeavor to advise his neighbor and others, as the Prophet (Sallallahu Alaihi wa Sallam) said: "The religion is indeed advise." Reported by Muslim.
If you make your efforts to advise them, and if they do not take heed, then the matter is in Allah's Hand. He guides whom He wills with His Grace, and misguides whom He wills with His Justice.
Allah says: ""So destroy not yourself (O Muhammad SAW) in sorrow for them. Truly, Allah is the All-Knower of what they do!" (Fatir 35:8)
Ibn Kathir may Allah have mercy on him, said: "So destroy not yourself in sorrow for them " Means do not get upset about that; Allah is indeed Wise in his predestination, He guides whomever He wills and misguides whomever He wills, based on His absolute proof and extreme knowledge, that’s why Allah says: "Truly Allah is the All-knower of what they do."
You have to be sure that the disbelief of this man or others, and their lies and falsities will not harm Allah at all, and it will not harm His religion, or and the Mu'min who love Allah. Allah says: "And he who turns back on his heels, not the least harm will he do to Allâh, and Allâh will give reward to those who are grateful." (Aali Imran 3:144)
Allah also says: "They intend to put out the Light of Allâh (i.e. the religion of Islâm, this Qur'ân, and Prophet Muhammad SAW) with their mouths. But Allâh will complete His Light even though the disbelievers hate (it)." (As-Saff 61:8)
Allah knows best.