A desperate person can do desperate things:
“According to NBC, in one video of the alleged shooter, Aghdam is superimposed over a background of what appears to be six-pointed Stars of David as she complains that her workout video has been age-restricted by YouTube.
...
”She told her family that YouTube had stopped paying her for the content she posted to the site, Ismail Aghdam said. YouTubers can receive payment for advertisements accompanying their videos, but the company ‘de-monetizes’ some channels for various reasons, meaning ads don’t run with them,”
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She had been reported missing by her family in Southern California, and her father Ismail Aghdam told police she might be going to YouTube because she ‘hated’ the company.”