Have you ever attended an invalid wedding? - how to make a problem out of something that is for normal people not problematic.
Quote:What are the rules for attending a non-Catholic wedding?
If a Catholic attends a clearly invalid wedding in the normal festive spirit, they are celebrating something which is, at least objectively “on paper,” a falsehood.
Another issue is the potential for scandal. Technically “scandal” doesn’t mean something “shocking”; it means causing others to stumble. If a Catholic — especially one with a ministerial or teaching role, like clergy or catechists — were to attend an obviously invalid wedding, this could send the message that it’s not a big deal to ignore the church’s marriage laws.
At the end of the day, you personally need to weigh the need to avoid causing scandal with potential concerns about family unity, keeping in mind what is truly best for the souls of those involved. I would suggest discussing your situation with a good priest who knows you well in real life.
https://thedialog.org/catechetical-corne...c-wedding/
teachings of the Bible are so muddled and self-contradictory that it was possible for Christians to happily burn heretics alive for five long centuries. It was even possible for the most venerated patriarchs of the Church, like St. Augustine and St. Thomas Aquinas, to conclude that heretics should be tortured (Augustine) or killed outright (Aquinas). Martin Luther and John Calvin advocated the wholesale murder of heretics, apostates, Jews, and witches. - Sam Harris, "Letter To A Christian Nation"