Many falsely teach the saints seen in Revelation 13:7 represents the Church, suggesting that (The Beast) will kill all Christians?
The saints on earth in Revelation 13:7 are the (Two Witnesses) seen in Revelation 11:7 below.
When the (Two Witnesses) finish their testimony after 1260 days, they will be overcome and killed by (The Beast) Gods Divine plan.
The saints seen in Revelation 13:7 dosen't represent the Church on earth, as many falsely teach in error, this represents the (Two Witnesses)
Revelation 13:7KJV
7 And it was given unto him to make war with the saints, and to overcome them: and power was given him over all kindreds, and tongues, and nations.
Revelation 11:7KJV
7 And when they shall have finished their testimony, the beast that ascendeth out of the bottomless pit shall make war against them, and shall overcome them, and kill them.
At first, your argument seems to have merit. But on further examination it becomes doubtful. Turning to Chapter 12 of Apocalypse we are given a "sign" (Rev.12:1 - the word "wonder" in the KJV is strictly " a sign"). This "sign" is a woman in heaven, and she is a MOTHER. She has THREE SEEDS; (i) A Man-child who is birn on earth and is Raptured to the throne. (ii) those who "have the testimony of Jesus Christ" - which could only be Christians, and (iii) those who "keep the commandments of God" (not Christ). Now, whoever the Woman is, and whoever the Man-Child is, is not part of this rebuttal. Much more, we want to establish who the other Two Seeds are. The reason for this is that outside of the word "saints" in Revelation 13:7, which is under dispute here, the word "saints" in the whole rest of the Bible, mean God's people.
As already mentioned, the Woman of Revelation 12 - a sign and a Mother - has seed that will rule the earth with a rod of iron. He is raptured and avoids the wrath of the Dragon who wants to devour him. The other TWO SEEDS are called, by the Holy Spirit, "the REMNANT", or "the REMAINDER" of her seed. I propose that the only people on earth who "have the testimony of Jesus Christ" is the Church. The Jew hates and curses Christ, and the Nations are indifferent to Jesus Christ. If so, then they form a company of men and women who were called THE CHURCH. Their fate during the 1260 days of the Great Tribulation, the same 42 months that the Beast reigns, is to flee to a wilderness. Now, a man, or men, cannot flee if they are dead.
So in Chapter 11 of Revelation, we have just TWO men who live in Jerusalem for the 1260 days, not the wilderness, and they are overcome and killed by the Beast. In Chapter 12 we have a company of men who have the testimony of Jesus Christ who are NOT killed - but flee. And in Chapter 13:7 we have an unspecified number of "saints" who are overcome but not killed. In fact, the following verses indicate that if they resisted with swords, they would die by the sword. Now, in Revelation 7 verse 9 onward, we have a"great multitude of men from every nation" who are connected to Christ, His throne and His blood, but passed through the Great Tribulation. And in verses 16-17, it says that;
"They shall hunger no more, neither thirst any more; neither shall the sun light on them, nor any heat. For the Lamb which is in the midst of the throne shall feed them, and shall lead them unto living fountains of waters: and God shall wipe away all tears from their eyes."
Now, the hardships in verses 16-17 are those encountered in a wilderness! Hunger, thirst, blasting sun and heat with sorrow and pain that produces "tears". Added to this, if the came out of the Great Tribulation it means that they SURVIVED it, like those of Chapter 12.
I propose that the REMNANT of the Church is overcome by the Beast, not killed, are driven to a wilderness and survive the Great Tribulation. Whereas, the Two Witnesses, overcome their enemies for the duration of the 1260 days, do NOT flee, testify in Jerusalem, NOT the wilderness, and are killed at the end of the 1260 days. IT IS HIGHLY UNLIKELY THAT THE SAINTS OF REVELATION 13.7 ARE THE TWO WITNESSES OF REVELATION 11.