My faith in God's victory is like the faith of Moses when Pharaoh's host came on him and his people to the shore of the sea, his companions said: We have been overtaken (by the might of Pharaoh and his host); Moses said: Never, God is with me and He will show to me some way to get rid of this situation.
Quran 26: 61-63, which means:
60. ..
And they approached the [Children of Israel] at sun-rise time.
61. So when the two hosts saw each other, the companions of Moses said: “Most surely we are being overtaken [by Pharaoh and his hosts.]”
62. [Moses] said, "No way; [they will not overtake us]; [for] my Lord is with me; He will guide me [to the way of safety.]"
63. So We revealed to Moses [saying]: "Strike the sea with your staff"; [so he struck it]; whereupon the [water] parted, so that each part [of them] was like a great high mountain.
64. Then brought We the others [: Pharaoh’s host] near thereto.
65. And We saved [from the sea] Moses and those with him, altogether.
66. Then We drowned the others.
More information is at the link:
http://quran-ayat.com/pret/26.htm#a26_61
Google search: quran-ayat.com/pret/26.htm#a26_61
N.B. A similar God's help may happen with the coming Mahdi: to save the believers and terminate the disbelievers.