Not even sure why I should be upset in the first place. If I get fired from my job, nobody is going to run to my aid crying that I deserved that job because my daddy worked really hard to put me through school (he didn't, but that's besides the point) and he wanted me to have it. No, I just get fired. How is a family farm any different? It's just an asset. Birthrights shouldn't exist past citizenship.
You're doing it again. You're assuming that it must be a just tax. You're assuming that a tax is somehow intrinsically "owed", that any tax requires no justification.
Citizens are taxed as individuals, not families. A person did not have assets, and now they do. I don't care that the land was "in their family." If they are even decent at managing their assets, then they will have more assets when they die than when their parents did. And if they don't, then it's not my concern. I don't believe in government policies to perpetuate generational capital wealth, and I will vote against them as long as we have a system where money can be used to influence the government.
You can make that claim, but the fact of the matter is that the US is a representative democracy, and our elected representatives make the laws. We are free to choose other people for the job if we want different laws. The vast majority of people were not lucky enough to be in a situation where their bumpkin ancestors just happened to possess a large swath of land, and so we don't vote to protect large swaths of inherited land.
They owe taxes? They can pay them. They can afford to pay them because they have inherited assets. "Oh no, they're gonna get a diminished inheritance. What a disaster." I'm not getting one, and neither are most of the people in the country. They'll still have their inheritance, they just won't have the land. And they aren't entitled to it if they don't have the money to pay their taxes.
I've watched chunks of beautiful Texas ranchland get sold off and built up by insufferable austinites for the marginal mcmansion. I will probably oppose a policy that encourages that and would rather the descendant of your so-called "bumpkin" keeps it.