The unifying thread in all given examples is that Meme Activism is good at short-term and superficial victories, but poor at long-term, meaningful ones.

It's great at getting a bunch of likes while harassing someone like Yang into shutting up, but did that action actually have any meaningful impact on how Israel acts, or how US politicians act toward Israel (not what they SAY, notice, but what they DO)? Probably not.

It's great at getting fame and money for the Kony people, but had no actual impact on the situation in question.

Slogans like Build the Wall and Lock Her Up served their purpose, which was to build an electoral base for Trump, not to actually accomplish those things.

I'm actually more sympathetic to Trump here, because he's a salesman using sales tactics to make a sale. The others clothe themselves in high-minded morality while in reality being exactly the same thing.