Salt in diet is interesting. If you follow a very low carb diet (hence will typically run with a low insulin level in the blood), you must ensure you are getting enough salt. Turns out that insulin has a effect on a lot of other hormones including those that manage salt retention by the kidneys.
If your insulin level is high, you will retain a lot of salt in the kidneys and indeed you must be very careful to minimise input. Equally, on a strict low carb diet, you can end up excreting a lot of salt- and may need to make sure you are getting some- especially if you are having quite a few low-carb greens (e.g. celery, dark green salad leaves) and exercising in hot weather.
So no, sodium isn't the enemy IMO- raised insulin and insulin resistance is. It influences so many things, and so if we can manage insulin resistance and also reduce overall inflammation (the two tend to go together) then we can eat a tasty dish of (say) scrambled eggs cooked in salted butter without any issues.
Unfortunately, the modern diet is filled with things that will make insulin resistance and inflammation worse in those who are pre-disposed. Cheap seed oils, a carb-heavy diet from highly processed grains, loads of refined sugar- it's not the traditionally processed meats that worry me, it's the highly processed carb foods and anything made with or cooked/packed in seed oils. They are everywhere, you need to buy basic foods (meat, eggs, veg, olive oil, butter, traditional cheese) to avoid them.
But as ever with such things- not everyone reacts the same and YMMV.
GC