Is it normal to not like people because of their weight?

Being overweight is objectively unhealthy and unattractive.

It's normal considering what you unfortunately had to grow up with. That was terrible how your mother treated you, parents are supposed to teach us that it's our personalities that matter, not our looks. They're supposed to help us overcome our self-consciousness, not create it. So anyone would have these thoughts after growing up with that.

You do realise though that you shouldn't dislike people because of their weight and that's the important thing. You don't chastise them for it like your mother did. And there's nothing wrong with being a bit picky about looks when it comes to dating anyway, everyone has their own preferences. So you just need to learn to think better about overweight people, but that's really for your own benefit rather than anyone else's. It's your actions that matter to society, not your thoughts, and you seem to be acting as nice as you can to people already.

Given that you grew up with a mother who apparently had an obsession about weight - and I gotta wonder where that came from and what demons she's had to deal with - it's hardly surprising that you're negative about people who are overweight. Most kids who grow up with prejudiced adult role models internalise those prejudices and negative stereotypes, whether they're about skin colour, religion, country of birth, body weight or whatever.

There's nothing wrong with finding a specific set of physical characteristics particularly appealing, but you seem to be saying that you can get to know a person well and come to like them, but your opinion of the sort of person they are will shift if they gain weight. Surely you must see that this is not rational.

There's nothing healthy at all about hating yourself for any reason. It's okay to believe you're less than perfect in some way and to strive to improve yourself by getting rid of that flaw or weakness, but there's always the potential for that to lead to an obsession that comes to take over your life. Eating disorders are insidious, addiction to exercise is a real thing and skinny people are sometimes not only psychologically unhealthy and unbalanced, but also creating physical problems that will manifest in the long-term.

Rather than listening to the voice of your mother in your head, check out your BMI and determine from that if your weight is in the healthy range. If it's on the high side, then look at making some small changes to your diet and activity level that will result in you gradually losing weight.

As for your prejudice against people who are heavier than what our current cultural norms deem ideal, you can learn to accept them for the people they are, rather than judging them by their appearance. You don't have train yourself to find obese people sexy, but we're all capable of overcoming the childhood indoctrination of our parents if we choose to do so.

Seems like you might be projecting your hatred for being overweight on other people

But being overweight isn't what most people would call attractive

everyone can be slim (like 98 percent, rarely someone has so bad condition that he or she can not be at least avergage in size). Just eat less! No more than 1000....1700 Cal per day and you are slim!

"Thick" is just another lame trendy word for fat.

Dont listen to the jerks who say its normal. No its not. Whether you're fat thin or whatever you deserve respect. So do others. Its fine to prefer dating a certain body type but to dislike them as a person based on weight? Pretty crappy.

It’s normal. Being fat usually means someone is lazy with a lack of self control

That's not nice. Your mom was a meany for doing it to you and now you're just repeating the cycle.

It's an unattractive trait. No wonder you're not attracted to it. I'm not attracted to fat girls myself, and I'm a fatty bumbalaty!

You are overthinking it all

I can relate to that but in a different way. I was always an odd kid and then learned to blend in but before I did I got a lot of shit for being a weirdo so I find myself being very judgmental to odd people. It just gets kinda ingrained in you that, in your situation, that fat is something negative based on how you yourself got treated when you were. You just gotta try to get over what was and look deeper. It starts with you accept yourself at the size you are and see all your good sides and see that there are people who likes you for who you are.