This video clip is the perspective of an extremist. I really don't feel like going further than that.
Muslims should not pick and choose, yes, but this fellow seems to be picking and choosing an awful not and citing abrogation as his justification. Abrogation is for verses like "don't drink if you are praying" followed by "don't drink at all". This was a specific means of weaning the booze-happy pagan arabs away from liquor w/o resulting in a city full of people in the throws of delirium tremens. When the Qur'an tells us to leave people who won't believe be that is a general statement regarding non believers that are around us. When it says "go forth and kill the nonbeliever" that is in the context of a war that was going on at a specific point in time, with specific nonbelievers and specific battles that are mentioned in the Qur'an.
This guy also implys that Shari'ah law is in the Qur'an and the Qur'an alone. This is incorrect. Shari'ah is extracted from The Qur'an, yes, but also The Ahadith; a collection of orally transmitted traditions attributed to The Prophet, his companions, and God. These passages make up the bulk of what we identify as Shari'ah. Like anything else the exegetical process is prone to error, since exegesis is a human endeavor.
Additionally, Shari'ah is not imposed on society. Whenever this happens it makes things worse for everyone except those in power. Shari'ah is intended to be an emergent behavior, something that emanates forth from the behavior of the individual, then the family, then the society, then the nation. If these conditions can't be met Muslims are commanded to adhere to the laws of the land in which they live, so long as those laws don't command them to sin.
I should have watched this last night, now I am going to be pissed off all day.
And speaking of AR15's:
http://i.imgur.com/VA31Y.jpg