It's a meta-analysis. It's not a controlled study like I asked.
And if you go back and dig through the original studies, not a single one of them is a controlled study. Not one.
They always require people to fill out cards of what they ate months or years ago. (This problem is well known - google: nutrition observational study problem)
AND there's the problem that people who eat bacon - which is "supposed" to be bad - often are overweight, and eat and drink way more other stuff that's bad, like tons of carbs, alcohol, etc. Which means that teasing out any actual harm from the bacon, is determined by a statistician. Not so obvious after all.
But if you or I exercise, are healthy weight, eat bacon in a low-carb way, don't drink or smoke, and consume lots of fiber (all of which are true for me, don't know about you) ... it's really not clear how serious a risk factor the bacon is. Compared to just - the risk of being alive.