The Koran contains very many verses which instruct its followers to violence and intolerance.
There are some verses specifically related to Jihad.
For convenience these Jihad verses are collated here into one booklet.
Of course when reading the Koran it is important to read verses in their context, and the 'Chronological Koran' is freely available for that purpose as a PDF file download.
There is the internal struggle, and there is the external struggle.
The external struggle is very bad news for non-Muslims!
Be aware of what is coming to you, read this booklet at least.
Available as a printed booklet here:
http://www.lulu.com/SolaVirtus
Available as a free PDF download here:
http://www.solavirtus.uphero.com/1_5_Downloads.html