Skrull Kill Krew

The Skrull Kill Krew are a controversial team of merciless anti-heroes in Marvel comics who have had many different members over the years but are in general made out of people infected with an alien virus that turns them homicidally xenophobic towards the Skrulls, devoting their entire existence to brutally killing them wherever they may appear.

History
The Skrull Kill Krew have their origins in a batch of infected meat that contained a virus which granted them similar shape-shifting abilities to Skrulls but also infused them with a murderous hatred of all things Skrull, thus they banded together to pursue this bloodlust and became greatly feared as a result by the Skrulls.

Basic Structure / Goals
The Skrull Kill Krew are a pretty easy to define group who share a collective goal to murder as many Skrulls as possible, they will not stop until either the alien virus is removed from themselves or all Skrulls in existence are wiped out.

Many of the group still seem to try and hold back in terms of killing other heroes but they do not have much care about civilian casualties, having wiped out entire towns in their zealous war with all things Skrull.

Due to the Skrulls inherent threat in the Marvel multiverse heroes may ally with the Skrull Kill Krew but they may also oppose them - such as Captain America.. due to their violent natures and uncaring attitude towards life in general.

Trivia

 * the group debuted in the 90s but were revived for the Civil War era of Marvel, both incarnations of the group are psychotic killers with strained relationships with other heroes and villains alike.
 * the origins of this group are a twisted take on "mad cow disease", which had large scale coverage at the time of the group's original debute.
 * the Skrull Kill Krew were published under "Marvel Edge" - which, given the violent and exploitative nature of the group, has become somewhat infamous.