I'm not sure its Boomers who create these images. It's Boomers who reply "Amen" to a pictures of six-fingered Jesus wrapped in an American flag. (Actually I'm not quite sure - maybe it's just mostly bots replying to other bots...?)

It's all bots. Humans are hidden in the margins of modern internet.

Boomers aren't making them. They are the captive audience in Facebook groups. I predict that around October, the content on those pages will switch to political stuff (at least for American audiences).