So I now 21F (was 20 at time) and my cousin 28M are both only children (I now have 2 step sisters I class as full sisters) we grew up extremely close until I moved away to another country when I was 4 yet we still stayed extremely close. He has other cousins where as I do not so I cherish our relationship and keep it close and love him dearly. As we got older and he moved out and I was more mature I started travelling over and staying with him for a few days at a time and flying home again. He came over and got engaged and I was there, I was then a flower girl at his wedding 7 months ago and everything was great until February this year. I am gay and I've been open about this since I was 13. My local pride event posted about certain political problems in MY area. Highlighted 'my' as he has been here twice and knows nothing about this area or country. I reposted it as I have loads of friends that I know would like that knowledge and he laugh reacted my post. I texted and asked nicely if he could remove the laugh react as my friends will see that and this country is all for cancel culture and I knew I'd get bother because of it. I asked nicely and explained my reasoning and he insisted I gave him a "valid argument as to why his taxes should go to transgender people" I was in shock and quite upset especially considering his taxes have absolutely NOTHING to do with my country. No matter how nice I asked or responded he demanded my Argument and so I took a few hours to think it through, I sent my argument to various family members for their opinions on if it was too harsh and they agreed it was a great response. My response touched on things like the fact he was a white straight male, the fact his country was much more advanced on equality, transgender rights and even same sex marriage and even as far as woman's rights and abortion rights. I stated that I love him and I appreciate everybody is allowed an opinion and although his was wrong to me it was okay if he found my opinions wrong to him, I just didn't appreciate him humiliating me publicly with a laugh react to show that. He never replied and ignored me until the end of last month. Our grandparents left his country and moved to mine a few years ago as we were more suited to take care of them and my grandfather has parkinsons and the care here is alot better. I texted my cousin regarding some problems we are having atm with our grandad and he replied and announced he had booked flights for the end of April and I tried to be civil and make plans and ignore the whole incident but I just cannot live in a space with him knowing what's happened. To touch up on this, I have autism, its very minor and not anything like the stereotypical autism, im sensitive to sensory things like too much or repetitive sound and certain textures but I also struggle to understand how other people feel especially towards me and I also overthink alot so in my head I cannot see him in person until we can agree to resolve the whole problem. Fast forward to yesterday, it was my birthday and I was having a really rough day and he reached out said happy birthday and asked how my day was and so I was honest and explained the whole situation and it was going great and I was feeling alot better about him coming over and was actually excited. We started to talk about the argument and I stated that we were both in the wrong as I can see how some parts of my message could have upset him but he also really upset me. He replied saying that my message wasn't an argument it was all insults (0 insults in my whole message) and proceeded to call me an idiot and state "who the f**k are you to tell me what I don't understand" which I once again would like to express was literally a message of me explaining the differences in our countries and how he doesn't understand what it's like HERE. I left my birthday dinner and sat in my car for an hour in tears with not 1 idea on how can possibly resolve something he very clearly doesn't want to resolve. My family are telling me he was definitely in the wrong but I shouldn't say anything and just pretend it didn't happen when he is here but I am just not capable of that. I think it should either be resolved before he arrives or I just make myself busy while he's here (he's only here 3 days) so that I don't have to see him. I'm not sure what to do but my family is really making me feel like an a-hole for thinking it this way.