What are those exactly? Docker seems to me more like a userland glue for kernel based containers, and since it's starting to support FreeBSD Jails, I dont see w

What are those exactly? Docker seems to me more like a userland glue for kernel based containers, and since it's starting to support FreeBSD Jails, I dont see why again it has to lead to Linux only, instead to FreeBSD OR Linux (or anything else supported by libcontainer for that matter). The main point is, Linux is not the only thing, and talking like that reinforces that incorrect point of view in other unaware people. Technology diversity is extremely important and cool thing.