I' lol try to give a very special answer that only can reflect my personal situation.
I adore all the people doing their best to help refugees, potential victims of murders and persons simply trying to reach Europe to stay alive or live in freedom and peace.
Concerning that question, it is a very concrete for me:
My fiancée and I will getting married next year. I am fascinated of people trying to help the refugees. They are doing the work Jesus Christ told us: Loving all humans and helping even persons they don't know - not asking for their religion, background, former life or anything else, but seeing the man who needs a helping hand. Therefore, let's ask the question in another way: Is that invitation a sustaining aid for the refugees? In a certain way - yes, because it is a symbol of brotherhood; in another way - no, because it is at first a symbol and not a substantial part of aiding the refugees: Whoever is able to celebrate a marriage in Europe or America has a certain level of security and a (very small, but reliable) outcome. Any person legally living in Europe is part of the richest 5 percent on our planet. (And by the way, that's the shame: We are so rich, my motherland Germany could handle to reconstruct the eastern part, former "GDR", within 25 years to one of the richest parts of the EU, but we - and not at first Germany - are not willing to support the poorest countries. A long-term-solution for these people loosing anything will not be to find in Europe but in a prospering African Economy.)
So, I personally try to stand up for human rights, the international help of all the people suffering in their home countries, the rights of refugees, asylum and security; and even as a (conservative regionally active) politician, I always try to give all I can to help people in danger.
But when I will marry my wife, I hope it will be unforgettable, a day celebrating the love God gave to my girl and me.
We are neither rich nor poor, we are part of the middle class, well educated, earning good money but not so much to spend every year 4 weeks outside of Europe, but earning enough to be able to make donations and engaged enough to see that help is in need.
We are both catholic Christians and believing in the Holy Church. So to be honest, I can't imagine degrading a Holy Sacrament to a "party" with several thousands persons - no matter if they are my customers, the inhabitants of our cities, tourists or refugees. If I were a millionaire, I would think about inviting to a party for people needing help on the day after, but so, I want to spent that day at first in the holy atmosphere of a church and after that, we will invite our family and our closer friends.
I guess, concerning my person, it is more important to have a reliable supporter concerning the political decision made in my country and giving long-term aid to the people than to celebrate especially myself through a gesture for a single day.