She's a loose cannon (to put it generously)

So, the Lidia Thorpe who was aggressively against commemorating the Queen's death:

At the intersection of Flinders and Swanston streets, Greens senator Lidia Thorpe, her hands covered in fake blood to highlight the impact of colonisation, addressed a seated crowd of about 500 people.

“You want to mourn the coloniser who brought the pain and the genocide and the murders here to our people. Shame,” Thorpe said. “The Crown’s boot is on our neck and we’re sick of it. And we are here to fight for our rights as the first people of these lands.”

was, only last year,  also so abusive to other aboriginal activists she doesn't agree with (on what, we don't know) that her Chief of Staff resigned:

Greens senator Lidia Thorpe’s former chief-of-staff says he was scared and appalled by her outburst in a meeting with two Indigenous community leaders at Parliament House last year, calling her behaviour among the most unprofessional conduct he has ever witnessed.

The claims by Thorpe’s ex-top adviser reinforce the account of the meeting by Aboriginal elder Aunty Geraldine Atkinson, aged in her 70s, who has previously alleged the tirade of abuse levelled at her by the senator distressed her so much she sought medical attention from the parliamentary nurse.

It's the fact that the party absorbs such immature, aggressive nutters that puts me off ever being able to support them, regardless of whether their policies have their heart in the right place, or not.