Quoting andthesenights:" It isn't a tantrum. It's anxiety, she's scared, she doesn't know these people. It's perfectly normal ... [snip!] ... to you, like you're the same person. She will eventually outgrow this. Do not try to 'correct' or 'punish' this behavior. "
babies really think you and them are the same person for about a year and half-2 years depending on the child. At least that s what the head nurse was telling us.
My daughter never had those fits. she pretty much likes everyone. I just handed her to people ( fam, friends, not strangers) all the time when she was little. I never made a big deal about it.