I think it's because the attacks on Hillary are actually credible and do not falter to scrutiny, while her critical words towards Trump are just a lot of repeat talking points from the MSM. I mean Hillary called her a Russian Asset without any concrete proof. Tulsi is right to be upset and sue her. The Trump critique is the same critiques we have heard for the past four years.
I didn't sleep at all when people presented critiques of Trump in 2016 because they were fresh and had not yet been put up to the light of scrutiny. Then the tenth time you hear something you kinda go "meh, heard this before." Imagine trying to stay awake while I try to reteach you the ABC song for an hour. Your meme is incredibly factual but I don't think many people actually understand the actual reasoning behind it. This is scary to me because for all I know the next "racist story" might be credible, but half the public will just ignore it as the boy who cried wolf.