Blogs are a familiar feature on the internet - where users post content in an accumulating manner, with comments, and search options, etc. They facilitate expression and exploration, and via attached comments, also debate and synthesis.
Reading and Navigating Blogs
Our blogs are quite powerful. Each writer can post, as is typically the case. Sustainers who have the option can also post, however. All Blogs appear in the blog system, and sometimes also in content boxes the top page of ZNet - and always via the left menu of the top page - and can be found via searches, etc.
Commenting on blogs follows the blogs, attached at the bottom, and blog comments, like all others, are also visible in many places that show comments including in the forum system. In addition, the entire blog system gathers content for everyone - but one can look at the accumulating content in many ways.
For example one can look at one writer's efforts - so one is seeing what is effectively a blog system for that one writer, or Sustainer.
One can also look at the content by topic, seeing blogs that are tagged as being about a certain topic - or place, as well. Thus, when doing that, it is a blog system about a topic, or a place, with many contributors.
One can look at only writer blogs, or only sustainer blogs, as well.
One can look at blogs for particular Groups, too.
All this is easily done using the left menu. Searches allow even more variables and refinements.
Creating Blog Posts
If you are a Sustainer with permission, and are logged in, you will see a link in the left menu for you to post a blog - and you can use that to post one, and then tag it various ways (such as with a topic or place, or a group tag), and once you do, it is in the system with you as the author.
You can also use the console button to the left to post a blog - anytime and from anywhere in the site, as long as you are logged in.
Meanwhile, enjoy the blogs - and, by the way, if you are a Free Member or a Sustainer with a ZSpace page, of course you can put one or more content boxes on it, pulling blog links of any sort you may want to filter for, for example, by you or by your friends or by others - and by topic, about places, for groups, etc.
It's certainly necessary to make distinctions, and to try to understand motivations -- not just of Palestinian suicide bombers, and bin Laden, but also of the communities from which they come and who they are addressing.
On motivations, grievances, etc., in the case of bin Laden I don't know of anything that goes beyond the standard sources: Jason Burke's al-Qaeda, to mention the best I know. Roughly the same in Scheuer's Imperial Hubris, Randall's Osama, and others, who give more or less similar analyses. Most take bin Laden pretty much at his word. The Pentagon apparently agrees as well. Wolfowitz explained reduction of US military forces in Saudi Arabia as a means to reduce the declared motivation that terror against the US is a reaction to US occupation of SA. In the case of bin Laden it is generally assumed to be the general ideology he has articulated over the years: in his terms, defense of Muslim lands from infidel occupiers and aggressors, overthrow of the corrupt rulers and imposition of his version of purist Islam. I don't have any independent evidence beyond the (largely shared) standard analyses.
Grievances are a different matter. Bin Laden-style terrorists apparently perceive themselves as a vanguard, seeking to mobilize others who may dislike and even fear them, but recognize that there is some justice in the cause they profess. As to these grievances, they've been no secret at least since 1958, when Eisenhower raised questions about the "campaign of hatred against us" among the people in the Arab world, and the National Security Council attributed it to their perception that the US supports brutal and corrupt dictators and blocks democracy and development because of its interest in controlling the oil resources of the region. Later investigations, intensifying after 9-11, found essentially the same results, along with anger about specific policies, particularly US support for the brutal Israeli occupation of the conquered territories and the murderous sanctions that were devastating the civilian population of Iraq. These grievances have only, of course, extended since the invasion. I doubt that you'll find much disagreement about this among specialists and intelligence agencies.
Of course, dogmatic ideologists prefer to orate about how they hate our freedoms, want to drive the Jews into the sea, etc. But I don't think serious analysts pay attention to these declarations.
How you evaluate the motivations is, of course, up to you.