They aren't, really. Of course, in the circle, none of this matters.
I avoid most seed oils, e.g., safflower, sunflower (regardless of how the seed oil is grown or refined) but canola is the single oil I take the most care to avoid. I use olive oil almost exclusively.
I don't have a decent theory about why it is particularly bad for me. Sorry I can't be more informative.
1) Canola oil is one of the healthier oils. 2) Monounsaturated fats help fight heart disease. 3) Naturally occurring trans fat is the same as industrial trans fat 4) Red meat has health risks
EDIT, included sources, with comments: [1] Canola oil may have dramatic negative effect on weight gain and brain health: "Effect of canola oil consumption on memory, synapse and neuropathology in the triple transgenic mouse model of Alzheimer’s disease" https://www.nature.com/articles/s41598-017-17373-3?error=dat...
[2] No clear benefits of MUFA-rich diets: "Monounsaturated Fatty Acids and Risk of Cardiovascular Disease: Synopsis of the Evidence Available from Systematic Reviews and Meta-Analyses" https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3546618/
[3] High trans fat intake associated with lower sudden cardiac death: "Natural trans fat, dairy fat, partially hydrogenated oils, and cardiometabolic health: the Ludwigshafen Risk and Cardiovascular Health Study" https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4816962/
[4] Claims on red meat risks that are limited to epidemiological studies (surveys) that are unreliable, do not factor for confounding variables, and do not conclusively prove anything. Keto diet, for example, has shown to lower cardiovascular risk factors: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5452247/
Epidemiological studies are surveys. They are not scientific proof of anything. This is an incredulous position to be taken by the WHO and makes me seriously question their values. They state they are small increases of risk, but do not even go into confounding variables inherent in surveys. True science isolates a variable and proves that there is a causation. It does not do so by correlation.
Regarding monounsaturated fats I was going off of some offhand knowledge -- while the AHA agrees with the claim generally[1], it looks like the truth may be more complicated[2].
Regarding the general un-healthiness of red meats:
* There are [3] numerous [4] studies [5] showing a link to an increased mortality rate.
* Red meat was categorized as Group 2A (probably carcinogenic to humans) by the WHO[6]
If there's more claims I made here that I can help to cite I'd be happy to.
[1] - https://www.heart.org/en/healthy-living/healthy-eating/eat-s...
[2] - https://www.hsph.harvard.edu/news/features/monosaturated-fat...
[3] - https://www.bmj.com/content/357/bmj.j1957
[4] - https://jaoa.org/article.aspx?articleid=2517494
[5] - https://web.archive.org/web/20120313084043/http://archinte.a...
[1] - WHO Says Meat Causes Cancer?:
Yes, the Beyond Meat burger does have a substantial amount of canola oil. But what's this about cholesterol and heart attack risk? Canola oil is one of the healthier oils - it's low in saturated fats and high in monounsaturated fats which are shown to actually help fight heart disease. The amount of cholesterol in a Beyond Meat or Impossible Burger is 0.
Let's compare that to even a lean burger (85/15): whose 4oz patty contains 102mg of cholesterol and a blend of saturated fats, trans fats, monounsaturated fats, and polyunsaturated fats. It's terribly unhealthy, and the risks associated with the consumption of red meat are well known.
The Mediterranean diet you promote also includes high amounts of monounsaturated fats (Olive oil). If I've overlooked some other deep seated risk associated to canola oil, let me know.