It would be nice if you provided the entire verse.

Being a christian and having studied the Bible, I know of many references where killing was called for in the name of the Lord. However, it is very dangerous to quote just a single verse to place it out of context to support an argument. As I have quoted here in other threads before "A text without a context is a pretext for a proof text." Meaning: quoting out of context to remove a passage from its surrounding matter in such a way as to distort its original meaning.

Here is the full verse from the Quran:

So when the sacred months have passed away, then slay the idolaters wherever you find them, and take them captives and besiege them and lie in wait for them in every ambush, then if they repent and keep up prayer and pay the poor-rate, leave their way free to them; Allah is Forgiving, Merciful. Compared Translations of the meaning of the Quran - 9:5

Verses from the Bible:

Job 36:12 (Whole Chapter)
But if they obey not, they shall perish by the sword, and they shall die without knowledge.


Isaiah 1:20 (Whole Chapter)
But if ye refuse and rebel, ye shall be devoured with the sword: for the mouth of the LORD hath spoken it.

Isaiah 66:16 (Whole Chapter)
For by fire and by his sword will the LORD plead with all flesh: and the slain of the LORD shall be many.

Jeremiah 44:13 (Whole Chapter)
For I will punish them that dwell in the land of Egypt, as I have punished Jerusalem, by the sword, by the famine, and by the pestilence