Greece's Golden Dawn party is a neo-Nazi organisation that has apparent ties to political violence. Even so the people responsible for murdering two of their activists are as bad themselves.
They are also idiots. Assuming that the killers are far left activists- which seems reasonable given Greece's historic problem with murderous Marxists- the aim is presumably to curtail Golden Dawn's electoral appeal. We have seen this before.
Pim Fortuyn of the Netherlands was not in any way a Nazi but he was libeled as such by the media, so his killing provides a good example of what happens when the fight against supposed extremists is carried out by murder.
In the subsequent elections his party they gained so many votes that they won a place in the Dutch government, while this didn't last long (because Fortuyn wasn't a good party organiser and without him there was no real institution to act in a coherent manner) government is not where Golden Dawn should end up.
The Saxon cross shaft in Rothley churchyard
2 hours ago