obnoxious friend

Selina
I had a dream last week that my husband was cheating on me; to me it was just a dream and nothing more. My husband thought it was funny and posted on FB about it because according to him he's "too ugly" to ever cheat on me. We've been married for 2.5 years, together for 8 years and first time parents to a 8 month old baby girl. In all of our years together, he has never once given me any reason to believe he's cheating nor has it ever came across my mind that he has or will.
So this morning, a friend of ours whom we both find to be obnoxious and has diarrhea of the mouth commented on his post saying something like "that's your marriage, if you want to believe that go ahead. There's always plenty of options out there." Followed by how I must think that my husband's commute is not as long as he says it is or if I'm really working the hours that I claim I am; that I might be thinking I settled for this, etc. According to him, I had this dream because my sub conscious is telling me something. NO, it's just a freaking dream. He's tripping.
I personally don't think he should be talking shit about our marriage considering he's the one that was being extremely friendly with another female who was childhood friend (even his own parents said they slept together and everyone assumed he was cheating), prior to them getting married, his wife who's also our friend cheated on him with his childhood friend,   He's also unsupportive of his wife's mental health issues, etc. Our marriage isn't perfect but we sure as hell don't have martial issues.
Ever since I've known him, he's always had diarrhea of the mouth and is constantly talking shit-- both him and his wife always have something to say and most time it's petty and mean plus they like to start drama. I'm actually at the point in my life where I want to cut his wife out of my life for good because she's toxic and a terrible friend to me.
This is the icing on the cake for me because I don't believe anyone as the right to come at my marriage like that when they obviously know nothing.
I am wanting to put his ass in check on FB but my husband says I would only be giving them the attention they want.
Thoughts?