What was the tasteless and inhumane posts referencing?

The post was mocking her grief by implying it’s not genuine. I think Charlie Kirk was a bigot who is now a martyr for the other bigots on the right. But I know nothing about his wife and I don’t think anyone should tell someone how to behave after their spouse was gruesomely murdered in front of a crowd, for all the world to see on social media. Honestly, I hate to resurface this whole topic, but it’s a reminder that both extremes of the political spectrum have lost touch with humanity.