Are you asking this in a seriuos manner? Really? I will assume you are and answer it.
When you do not show what was said before and what was said after, you cannot know the context in which the item was said. Here is an example:
Obama said "we have fought fiercely for our beliefs. And that's a good thing". Taken out of context, I can say that Obama thinks the fight between AQ and the US is a good thing. He WANTS the death and destruction caused by this fight since it is a good thing. I could easily snag this snippet from a larger video.
Of course, taken in context, he actually said "It's no secret that those of us here tonight have had our differences over the last two years. The debates have been contentious; we have fought fiercely for our beliefs. And that's a good thing. That's what a robust democracy demands. That's what helps set us apart as a nation." as part of his 2011 State of the Union Address.
Context is important. We both know this, but since it will destroy your little hatefest, you pretend to be stupid and say it does not matter.