I wanted to keep my response short out of a desire to avoid getting into a drawn out discussion and I apologize that it came across as dismissive or disrespectful.

Accepted!

Hudson said that Georgists foolishly sought an alliance with right libertarians and were rebuffed.

No, he doesn't. He says that he sought out such alliances and they didn't result in any substantial increases in the number of Single Taxers. These are not actually the same thing, I think you're trying to read between the lines of one section without looking at the rest. Example: "By focusing on ground rent to the exclusion of other forms of rentier income, and by opposing public regulation of industrial capital, they became opponents of mainstream reformers. Most became anti-socialist libertarians by the mid-20th century." and "In my own belief, the main reason why George’s followers have been so politically ineffective in mobilizing popular support (or even discussion) of a land tax is their attempt to become junior partners in a political alliance with libertarians that never had much chance of success. Libertarian ideology in America is essentially an anti-tax ideology, and a land tax remains among the most politically contentious economic proposals, having been a major factor impelling mainstream economics since Clark’s day away from the classical antipathy toward the “free lunch” of economic rent to a rationalization of such rent—and even land-price gains—as being earned. By turning the Henry George Schools into a funnel into the anti-tax ideology of Ayn Rand and Ludwig von Mises, George’s followers have walked into an effective political wall, while breaking with the opposite wing of the political spectrum that still treats Progress and Poverty as a socialist classic. This political position reflects that of George himself."

Georgism is a very thin and myopic ideology. Hudson is focusing on where George took it, in the direction of individualism and the exclusion of other reforms and taxes, as an example of it becoming a "junior partner" to right libertarianism. George didn't invent the concept of a land value tax, nor the idea of instituting one to balance out a form of rent-seeking. He's primarily distinguished by focusing nearly exclusively on it, actively excluding other forms of regulation, taxation, or power analysis, and as Hudson says, building any kind of popular movement. You can still see this among internet Georgists today that still do shit like argue that all other taxes are immoral and should be opposed.

Georgists didn’t really have anything to offer them, because they have no power or influence and they’re inflexible regarding policy. I don’t think that trying, ineffectually, to get right libertarians to cooperate with you on something they’re opposed to makes one a right libertarian, it just makes them foolish and incredibly naive.

Modern Georgists are essentially libertarians that like a LVT that goes into UBI. They fight against other regulations, reforms, and taxes on the basis of individual freedoms and saying they can't be justified. The greatest departure from this is in sometimes paying lip service to taxing other forms of rent-seeking, but this is not consistent among Georgists. Similarly, they are actively anti-socialist and oppose a class analysis beyond collaborationism. These modern Georgists are not actually a serious departure from George himself nor the Single Taxers, they're the natural conclusion to the direction he personally went and are very similar to the positions adopted in the early 20tg century. One difference is that the early Georgists lacked a consistent idea of how to redistribute the proceeds.

This implies that Georgists were actually successful in courting right libertarians, which isn’t accurate.

No it doesn't. Georgists were already very similar to right libertarians and moved closer to them. Hudson points out that many simply became libertarians - it's not a big leap, at all. Movements can stay small and recruit and change character and do so all the time because they have high turnover. While I don't know whether this is definitely the case, I would guess that this describes early Georgists as they cycled through and alienated reformers and socialists, then buddied up with libertarians

In reality it’s more like, they were weird cranks demanding that everybody do their thing first, and when their attempts to get socialists to focus exclusively on their thing failed, they tried to get libertarians to focus exclusively on their thing which also failed. Hudson’s criticism is that the attempt to form an alliance was doomed to failure because their objectives and policy proposals were fundamentally opposed, and that they wasted the opportunity to form an alliance with socialists, who shared similar values and objectives.

Nearly so. Hudson also points out that their individualism and exclusion of other taxes and reforms made them similar to libertarians and that they became a funnel for libertarianism. They still are, but with some Yang Yang bazinga brain thrown in for good measure. The key failure wrt libertarians is that they are fundamentally opposed to all taxes and basically all government, so the small jump to "just one tax" is still a step too far for them to become Georgists en masse via idealism.

In contrast, socialists had a class analysis and a wide set of reforms, particularly nationalisation of a number of industries and pro-labor legislation. Instead of being one policy removed from socialists, socialists just also liked his views on systemic causes of poverty wrt rent-seeking and instituting a LVT on top of their other reforms. The world in which this would be a more natural alliance is one where George didn't shit on socialists and unions and other reforms, but pushed LVT as a significant but not exclusive tax.