Parents Ruining Minimony Planning

Posting here because I don't know where else to turn.


After postponing our June wedding, my fiancé and I are getting legally married in September for personal/legal reasons. We were going to do it in the church we originally booked which is in the same faith that my grandpa (a reverend) served in. It's also the same faith my parents were originally married in before they renewed their vows in the Catholic Church. This week, my mom and dad called to say they had "good news." Their news was that my mom had reached out to a Catholic Bishop in the midwestern state where I'm from (without asking us) and he agreed to fly out to the east coast city where we reside, to marry us. (We would need to cancel our venue and the Bishop would also have to quarantine for 14 days.) We did not ask them to do this and declined the offer as it may put him in harms way and would result in extra costs to all parties. Not to mention the fact that my fiancé is not Catholic.
They said this was the most "rational" thing for us to do since our Church could not 100% guarantee they would be open in the event there is an uptick in cases (the church recently reopened). My parents then said we were putting them in a difficult situation to turn down a Bishop.
Tonight, my mom copied me on her response to the bishop. I could see the entire email chain. It was discussing my personal life and talking about how our marriage would not be recognized by the church/God the way it's planned now. She also said she and my dad cried when the Bishop presented his offer and they were embarrassed by our choice to decline his offer. The whole email thread was thinly veiled gossip and judgment about my fiancé and I.
Right now, my parents are the only ones who will be there on that day. We had originally hoped it would be parents and siblings but due to international travel restrictions, that does not seem possible.
I am having serious anxiety that my parents will ruin our day. My mom already said she will be attending mass that day before our ceremony because she has to have the Eucharist daily. She has already flipped out on two of our vendors.
I'm really struggling right now. My family has never been supportive and it seems like my mom has tried to cause drama from day 1. I feel isolated from the friends and family that originally had planned to be at our wedding and would have been supportive.

My fiancé doesn't think we should uninvite them as this may cause more drama and cause them to back out of supporting our larger celebration next year, which they agreed to help pay for. However, they are n paying for anything in September and I'm not sure the stress and heartache is worth it.