American Imam explains how Islam punishes apostates by killing them for Allah's sake

As you can see in the video below which went viral on social networks, an American imam explains how Islam (which is supposed to be a religion of peace) punishes those who convert to Christianity.
This video was posted on social media by a human rights organization called "Ex-Muslims of North America" which works to protect those who have left Islam and face persecution, discrimination and even death threats from their communities.
According to their site "Ex-Muslims of North America advocates for acceptance of religious dissent, promotes secular values, and aims to reduce discrimination faced by those who leave Islam."
Please follow this organization all over the social networks and help raise awareness of the brutal persecution of those who have left the religion of Islam all over the world.
In countries like Iran and Saudi Arabia, Ex-Muslims are executed in public squares, or even killed by their own family members in so called "honor killings".