Even Rashad Khalifa himself Said that "The Most Important Difference Between God's Messenger and a Fake Messenger is that God's Messenger is Supported by God with Invisible Soldiers and is Guaranteed Victory and Dignity in this World, while the Fake Messenger is Not"
And yet "Rashad Khalifa, was stabbed and beaten to death." - tucson.com
But God Himself Said that He will Surely Save His Messengers, and Thus, He Saved Noah, Hud, Abraham, Lot, Salih, Shu'ayb, Moses, and Jesus, for Every Nation Intended to Seize their Messenger, but God was their Protector, and He Destroyed those who Denied His Signs
37:171 - 172, Qur'an
Our word has already preceded for Our servants, the messengers, [that] indeed, they would be those given help -
21:70, Qur'an
[For] they intended harm for [Abraham], but We made them the greatest in loss.
7:83 - 84, Qur'an
So We saved [Lot] and his family, except for his wife; she was among those who remained [with the evildoers]. And We rained a rain [of stones] upon them. Then look at how the end was for the criminals.
26:65 - 66, Qur'an
[But] We saved Moses and those with him, all together. Then We drowned the others.
Luke 23:21, Gospel
[For the Children of Israel] cried, saying, "Crucify [Jesus], crucify him."
[And thus, when Rashad Khalifa was attacked, he had no protector, for he was stabbed to death, for] "God's messenger is supported by God, while the fake messenger is not." - masjidtucson.org