I wouldn't completely write them off. Yes, that would be overreacting.
But as for your child's 1st birthday party; let's just say that no one reeeeeally considers those parties a super big deal except the parents and maybe grandparents. I would not count that against them. Some families are really into birthday parties, some aren't. Doesn't mean they're bad people or have some hidden vengenence or angst against you.
As for facebook. I dunno. I know its difficult NOT to read into things on there. It *is* socializing for lazy people and if they can't even type a few words and hit 'enter', then... well that's beyond lazy. But again... it could just be that they were not brought up to be that cozy with extended family members or maybe they were never that close with your husband growing up & aren't the type of people who decide "oh just because we have kids and are all adults, we should just act like we love each other and hang out".
Some people do, some don't.
If I were you, I'd just try not to be offended by it or feel like this is some huge oppression.
My brother's wife (married 8 years) to this DAY, will not respond to me on facebook, never comments on my photos and doesn't return my calls. (i don't stalk the woman, but he's in the military so sometimes she's my only inlet). She rarely comments on anyone in our family but if she does, its usually my older sister. And one of my older sisters just got married and her husband still has me on this "blocked" list on facebook so I cannot post on his wall, or see his status updates or photos. It is really odd bc he comments on my husband's all the time and we give them $ all the time, like wth did I ever do? of anyone in our family, I probably get along with him the best. But again, I have to just ignore it and not read in to it. Maybe he did it by accident? lol
I am the only one in my family (nuclear) to have kids (im the youngest; 31) but we're all married and own our own homes etc. My other siblings just chose not to have kids. So I would think my extended family on my mother's side would MAYBE?? comment or at least 'like' some of my photos. They are their neices and cousins afterall! but nope! I could post the cutest photos of my girls or announce a huge acheivement and I get nothing... yet my older sibling posts a photo of a bunny in her garden and she gets all the family responding to her!! LOL
hello! I'm over here?
haha so I know how you feel.
but again, I'm the youngest so I was always the outcast and grew up in the family sort of in the shadows of my siblings who were all MUCH older and my extended family still relates to that younger version of me I guess.
Can't lie and say it doesn't hurt but I know they are not INTENDING to hurt me. And they're great people.
Don't give up.
Continue reaching out.