My Mother (RIP 5/2/11) was a big proponent of margarine in the 50s & 60s, but we kids wouldn’t eat it on anything. After 40yrs, both her neck carotid arteries clotted-up and she suffered 6 very minor TIAs, and they had to be surgically bypassed. We tried for years to wean her off that garbage, but she loved it, and I blame it partially for killing her.
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I'm very sorry about the loss of your Mother.
My mother was a fan of margarine as well. She died of heart failure, which was found to have been the result of clogged arteries as well. My husband and I use butter, olive oil and peanut oil. Imho, the taste of margarine can't compare to the taste of butter or olive oil.