The Omen triggered us worse than I expected it would. We tend to feel fairly safe with movies we've already seen a couple times but sometimes a particular scene or moment really jumps out on a particular viewing, without having done so before.
One thing I've come to appreciate is that "cheesiness", the mere fact of being a cheap-looking or ineptly made movie, isn't any sort of protection against this sort of thing. If a scene is emotionally wrenching, it doesn't have to be well-acted or handsomely staged. Two actors shouting lines at each other, without backgrounds or props or scenery, would be enough to grab the emotions.
There's this too: mainstream American entertainment is heavily censored de facto by long-standing industry conventions. There's a huge range of stories that you will NOT ever see in a Hollywood feature film or a prestige show on U.S. television. Historically therefore stories about upsetting or controversial topics, especially anything pertinent to social realism and social justice, has been condemned to marginal media: "B-movies", direct-to-video, Internet video, and so forth. (These domains have, however, been aggressively colonized by reactionary and extremist Christian propagandists.) In other words, movies about emotionally fraught topics are likely to be cheap and amateurish. Otherwise, they wouldn't get made at all.
"Bad movie culture", which became a big thing in 1990s Internet days and renewed the popularity of Michael J. Nelson and other persons associated with MST3K, now seems a bit like a right-wing psyop to me. I don't think there was any actual conspiracy, mind you, just a coalescence of motivations. Right-wing "humor" is abusive and petty anyway, so making fun of cheap-looking movies would be up their street. They'd be drawn especially to be making fun of anything that stirred up powerful emotions. Hence the "bad movie culture" that I observed during this time condensed around a set of reactionary values: worshipful of "classics" and their emotional flatness relative to "art-house" movies, contemptuous of anything that was "political" or which was "manipulative" (i.e. too emotional), and obsessed with technical perfection.
I'm glad there's a lot more loving commentary on old cheesy movies (q.v. Diamanda Hagen and many other YouTube presenters). I hate to admit how many times I watched rubbishy Cinema Snob or Nostalgia Critic videos for some glimmer of MST3K nostalgia vibes, usually when I was so miserable that only meager and mean-spirited entertainments seemed tolerable. It's far more rewarding to watch "bad movies" like they were anything else, and then they're a source of pleasant surprises.
~Chara of Pnictogen