family feud and could care less

Hey guys, looks like recommendations have changed since the last baby and doctors are recommending that visitors all be current on whooping cough vaccines. I researched a bit and strongly agree with the recommendation and would be happy to provide you some information if you'd like. Just as I expect you to respect my choice to follow this guideline, I respect your decision to decline if you are uncomfortable with getting a booster... Please understand I'm saying this now so you are not offended come April if I ask you to wait 6 months to visit as the baby will not be fully vaccinated until then and it's not a risk we are willing to take, lots of love

So Christmas eve I saw them all as usual but everyone is giving my husband and myself silent treatment irritated I would dare send such a disrespectful message.... Christmas I decided not to go because I'm not exactly keen on visiting when everyone is going to ignore me and make underhanded comments in front of my 5/6 year olds... To avoid conflict since it was Christmas  I even texted stating I wasn't feeling great and wouldn't be able to go and didn't bring up the obvious tension... So today my sisters actually blocked me on fb and my mom is being passive aggressive on it... I'm 30, my sisters are in there early twenties so blocking me really just makes me laugh at how juvenile they are being... 

Now I am sitting here and actually thrilled that I really don't feel stressed or the need to make it better but wondering if I should even let them visit if they do get the vaccine... (There was a comment about just lying to me, or them not caring and coming to visit in hospital regardless) ... I'm kinda determined to stay level headed and mature but truthfully I'm usually confrontational and blunt... How does one manage this with tact? Lol I'm not caving on it no matter how they feel but wanna stay the level headed one