My family hates my boyfriend

So recently I found out my family hates my boyfriend. There's been tension between all of us for a few weeks and I couldn't figure it out, keep in mind I've been dating this guy for 8 months at the time. All of the sudden my brother has a huge issue with him and so does my mom. My brother thinks he's rude and insensitive to him because of a joke my boyfriend made while trying to break the ice. My mom on the other hand only wants me to date men in the military because they have good insurance. I wish my mom and brother could view it how my dad views it. My boyfriend treats me extremely good, basically like a princess and makes me happy. I just am at a point where I'm upset about my family not liking him and the thought of not being in a relationship with him also makes me upset. I just needed to get this off of my chest because it's really been negatively affecting me.