There is also this story from Vice about how the Daily Wire and other conservative groups spent literally tens of thousands of dollars promoting misleading ads and propaganda about Amber Heard on social media. So this could all at least be partly rooted in far-right political extremism.

According to one of the sources, their propaganda attacks Amber Heard to cater to the misogynistic sentiments of their audience. "This particular publication is a very successful conduit of material from the far extremes and mainstreaming it into the conservative circles," the source said.

https://www.vice.com/en/article/3ab3yk/daily-wire-amber-heard-johnny-depp