Euro polls are surprisingly weak for the far right. I'm guessing most of the Martin voters are FPO/BZO types despite Martin's own moderation?
Also, is the LIF running? As I recall, they have an MEP who defected from Martin's List.
I think it's more the fact that FPÖ/BZÖ voters are not coming out in numbers like they would in federal elections. They don't like to vote for something they hate. Take my parents for example: They nearly always vote in federal elections, but won't vote in the EU elections. My mum even asked me: "Why should I vote for this circus ? I'd go voting if I could vote for the exit of Austria from the EU." 
On the other hand I think Martin benefits from all parties. Remember that Martin got 14% last time and is now polling far below that number. People who want to vote for FPÖ/BZÖ are also voting that way. But some may sure see Martin as a protest vote and don#t want to support the Far-Right either. But there are no reliable polls to support this.
The LIF won't run, nor will MEP Karin Resetarits, Martin's former colleague (now in the Liberal Fraction), except Libertas convinces her to run.
Your mother is a very sensible person, Tender. I share her feelings--though I'll vote for Libertas if they field a list here.
