the name is The Greens - European Free Alliance so I am not that surprised it is the first choice for green parties

No, the question is why The European Green Party_ decide to form a European Parliament Group with the EFA instead of other forces, or to group by themselves.

The EFA, after all,

>generally limited its membership to progressive parties, and therefore, not all European regionalist parties are members of EFA."

Also, the alliance of the European Green Party with the European Left Regionalists explains this spat.

guaranteed to evoke a violent reaction from police is to challenge their right to "define the situation." --- David Graeber citing Marc Cooper