This is a chapter. I chose it randomly. Now keep in mind this is an Islamic-promotion web site rather than an anti-Islamic web site. Here are some of the passages from that chapter:
57. So if you gain the mastery over them in war, punish them severely in order to disperse those who are behind them, so that they may learn a lesson.
59. And let not those who disbelieve think that they can escape from the punishment. Verily, they will never be able to save themselves from Allâh's Punishment.
60. And make ready against them all you can of power, including steeds of war (tanks, planes, missiles, artillery, etc.) to threaten the enemy of Allâh and your enemy, and others besides whom, you may not know but whom Allâh does know.
65. O Prophet (Muhammad)! Urge the believers to fight. If there are twenty steadfast persons amongst you, they will overcome two hundred, and if there be a hundred steadfast persons they will overcome a thousand of those who disbelieve, because they (the disbelievers) are people who do not understand.
67. It is not for a Prophet that he should have prisoners of war until he had made a great slaughter among his enemies in the land. You desire the good of this world (i.e. the money of ransom for freeing the captives), but Allâh desires for you the Hereafter. And Allâh is All-Mighty, All-Wise.
On the other side, I did see a hopeful passage in that chapter:
61. But if they incline to peace, you also incline to it, and put your trust in Allâh. Verily, He is the All-Hearer, the All-Knower.
But the downside is that this quote is within the context of having defeated non-Muslims in battle. And the peace has lots of stipulations, including a choice of conversion to Islam or death, or for Christians and Jews, a heavy tax and fewer rights.
None of this is very encouraging. But it is better to deal with reality than make decisions based on false assumptions. I think the best thing any of us can do before we learn anything else about Islam is to read the Quran ourselves.I have found a very readable version of the Quran. Read a review of it here: A Simple Koran. It is made to be easily understood by the English-speaking reader.