Is it normal that i can't stand my mother-in-law?

I hate my mother in law. I'm almost certain she has high-functioning autism or some other social disorder. She acts like a space alien. She wears clothing that doesn't match, has difficulty talking about anything other than science, doesn't understand human nature in the least. She says completely inappropriate things all the time- For example, when she first met me, she said, "when I found out you dated men before [husband's name], I was so worried you might have AIDS. I was so happy to hear you got tested for [husband's name]!" Who the heck says something like that?!?

When I first started dating her son, he wore clothes two sizes two small with coke bottle glasses and had severe BO. I taught him how to dress well and was frank with him about his body oder issue when we first started dating. It turns out he's a smokin' hottie with modelesque good looks-- but no one could see it under his Urkel attire! She blames me for his lack of professional advancement-- In reality, I believe many of his professional issues have been brought on by her not socializing him correctly as a kid (he acts very effeminate and never learned how to be "a guy", which doesn't bother me in the least, but can make some less-evolved folks in the professional world uncomfortable). He's recently started a business training animals and breeding show dogs and has agreed to be a "house husband" while I hold down my corporate job, which I love. Of course, his mom bashes me for "forcing him into a female role," says he's "wasting his education" and that he's "only doing this to please [me]," completely forgetting that he's happy to stay home all day, clean the apartment, make tasty meals, raise dogs and eventually kids. While he holds a PhD in Math, he also loves animals and kids and is excited about his new business and being around our future kids while they grow up. The only time he ever doubts his choices is when his mother comes to visit and criticizes him, me, the city we live in (she wants us to move back to the midwest) and claims that I'm "wild" (I'm a business woman, have a lot of friends, drink lots of wine and she's stumbled upon pictures of me smoking cigarettes in my early 20's- I quit years ago, though!). She continually goes on and on about different health issues she's worried I might pass on to my children because of my "wild life style" and says I'll be an irresponsible mother.

On the other hand, most people think how I feel about my MIL is unfair- They say all mothers are overprotective of their sons and critical of their wives. Everyone agrees that she's quite strange indeed, but my friends tell me it's funny and that I should take her with a grain of salt. I frankly just wish she'd die- And soon.

Is it normal to hate a critical mother in law this much? Is it normal to feel angry at her for never teaching my husband to be "a man," then call me emasculating? Is it normal to be embarrassed around someone who can't even match their clothing? Am I being unfair?