I'm just trying to wrap my head around your concession that there is a link then your repeated insistence that this is the wrong thread for such a discussion. Why do you care?
Me personally, I don't see any meaningful difference between a President hinting that he'd appreciate violence from white supremacists such as that biker gang directed against his opponents and the white supremacist shooting Muslims in NZ. Trump has already advocated shutting the Muslims out of the US, called Mexicans rapists, drug-dealers and such, and if a President is happy to encourage/sanction such activity against one law-abiding group, IMO there's no meaningful difference between directing that violence one law-abiding group and another.
Do you think it's only proper that we have multiple threads, one for every group that Trump considers to be his opponent? Do you think his reasons are going to ever so different depending on the group he advocates violence against?