Where do you draw the line between legitimate fat acceptance and science denialism?

[TaraJo]

Ugh.  I'm having crazy people rant at me on facebook over this.

So, did you know that it's impossible to lose weight without hating fat people?  Did you know that you're a horrible person if you don't want to date someone with a lifestyle that isn't compatible with your own?  Did you know that there are absolutely no negative side effects to obesity?  Did you know long term weight loss is impossible and even trying to lose weight will hurt you?  These are just a few of the gems thrown at me over the past few days on a few facebook groups.  My crime?  I lost a lot of weight since 2016; about 130 pounds and I am VERY proud of my accomplishment.  But now I have a whole crowd of "fat acceptance" people who are jumping down my throat, telling me that I'm such a horrible person for it.

I'll be the first to admit, we shouldn't mock or laugh at people for being fat.  And, yes, there can sometimes be health issues that make weight loss difficult (although, many of those health issues would also resolve themselves with weight loss).  And, yes, anorexia and bulimia exist and are serious issues that should be discouraged.  And sometimes (most-times?) the media has a nasty habit of giving people, especially women, unrealistic body images.  I'll even go so far as to say, yes, it's your body to do with as you please, although if you ARE someone I care about personally, I'll encourage you to get healthy and if you ask me what I think, I'll tell you that being fat is hurting you.

So on those fronts, I'm mostly in agreement with fat acceptance.  And if it ended there, I'd be ok with everything.  Problem is, it doesn't.  Something about the internet brings the dumbest people with the worst beliefs to the surface and if you do a search on instigram or twitter or tumblr for terms like "body positive" or "fat acceptance," you'll find some really bad stuff.  I don't hate fat people, at least not for being fat (I hate a few individuals who are fat, but I don't hate them because they're fat).  But I'm proud to have worked my ass off and lost that weight and I feel better than I've ever felt in my life. But, yeah, because I lost that weight, I must hate fat people.

Here's a few of their gems: 

1)  Desire to lose weight is inherently fat-phobic and it means you hate fat people
2)  There are no health risks to obesity
3)  There is extreme health risks to losing weight because you're giving yourself an eating disorder
4)  Losing weight is nearly impossible and long term weight loss IS impossible.  If you're lucky enough to lose weight, you'll just gain it right back
5)  Fat people can be just as physically active as non-fat people
6)  BMI is garbage since professional athletes will have a high BMI despite being in great health
7)  Since thin people can have these health issues (like heart disease, sleep apnea, diabetes, ect), then that means being fat doesn't cause them

Am I alone in thinking that this has a nasty habit of going into junk science?  Or science denialism?  Is it wrong for me to want to keep this weight off or to work hard to stay strong and healthy and, yes, thin?