Ok since you are either ignorant or quite dense:

The Irish were forced into monocrop agriculture by their Imperial Overlords, as colonial subjects extracting resources and establishing a very fragile and inequitable economic system for the Irish.

The Famine was greatly exacerbated by capitalist agents of their Imperial Overlords exporting food from Ireland, which could have fed the Irish, but they were paid so little, their buying power could not compete with higher prices offered by exporting.

Also, Israel is currently committing a genocide inasmuch as they have militarily invaded an area, bombed it into and its inhabitants into oblivion, killing far, far more civilian casualties than combatant, with multiple instances of designating safe areas for civilians to flee to and then bombing the fuck out of them weeks later.

Oh, and they're also causing a famine by not allowing food in, even drone striking and shooting up UN food convoys.

Finally, some forms of racism become unacceptable in the current day because attention and scorn are brought by people who make the atrocities of the past known.

You're probably not gonna be able to get away with polite company hearing you refer to a black person as a n##g##r or an arab as a sand n##g##r or an asian person as a ching chong, even though you absolutely could not too many decades ago, and the reason that is the case is that social movements brought historical wrongs into present attention.

That it is still acceptable to joke about irish potatoes is something that seems strange and hypocritical to an autistic person who is far more likely to see the arbitrary nature of social norms, is far more likely to try to establish consistent, inviolable rules, than to an allistic person to whom the rules of socialization are basically processed and determined subconsciously, without need for an analytic approach.