Am I the drama for making my Ex-boyfriend sin!

Before I get started I wanted to let everyone know that I have Dyslexia so I apologize in advance!

Ok time for a bit of background about this whole situation, I am a 24 year old Genderfluid aromatic bisexual human, I mainly use the pronouns he/they. I have know that i was Genderfluid for about 5 years now. I meant my now (thank the stars) ex when we both were about 15-16, turning this time i only identified as being bi, I had not realized that I was fuild yet so that means I was identifying as she/her. I hope that makes sense.

Now my ex and I were complete opposites but we got along that was until he started trying to control me. My ex was a very old-school Christian thinking home school guy, what I mean by this is that he hated any type of body modifications and was expecting me to be this "sweet and obedient pasters wife that would push out baby after baby" . You see i was non of that i love kids but I hate the idea of having kids, I have 8 piercings and 3 tattoos and I can be very dark and stubborn at times. He hated that I was i was in public school and had guy friends and i wasnt at his becken call 24/7. I knew that we wouldnt work out but i ended this when he found out I was bi and told me and I quote "oh its ok I know a place that we can take you to get you fixed" yeah I was don't at that point so I ended it.

Now present day I was at my friend's party and on of their friends brought their brother let's call him D. I have never met this person and my friend has met him in passing maybe 3 times. So we all were talking and i brought up about my identity and so D asked if I ever dated and laugh a bit telling him about my ex and he looked at me horrified. I asked what was wrong and he asked me "how can you laugh and feel ok about making your ex sin?" I was confused and asked what he ment. So he told me how it was wrong for me to have forced my ex to date someone of the same gender when I knew he was an iod school Christian. And I said that didnt make any sense at that time in my life I didnt know I was fuild. But he threw it back at me saying it didn't matter since I was born fluid and I don't become fuild (like how Trans men and women are born trans). And i told him that may have been true but I did make my ex sin since I didnt know my true self then so I didnt think that, that should count. D called me a sinner and evil person once again. All the while my friend and my friend's friend (D's sibling) starred shocked. D was quickly pulled away and yelled out while I was trying to not cry.

I have gotten several apologizes from my friend and D's sibling saying they had no idea he was say and do all that.

So am I the drama or ah for making my ex sin, I really need some help with this I've been sick to my stomach thinking I've hurt someone just by existing and being who I am even when I didn't know who I truly was yet.