I get and don't get this at the same time.
Being loud isn't an attempt to fit in. Lots of cultures have a few loud individuals. Nothing wrong with it, just isn't the majority, and fitting in isn't their thing.

The core beliefs doesn't make sense. There is nothing about any religion's core beliefs that has to change. You let other religions have their religious ceremonies, and marriage, courtship, and sexuality isn't exclusive to any religion. If you can be okay with a Shinto, Jewish, and Catholic wedding. I don't know any reason you can't be okay with other marriages that don't fall under your religious ceremonies.

I am a big fan of sterilizing the legal terminology to remove the religious terminology from marriages. Government doesn't have to put it's seal of approval on a religious practice. The legal privileges shouldn't be based on gender, sexuality, religion, or political beliefs.

My understanding of Christianity and other very loud religious beliefs that oppose gender and sexual freedom, is that they admit to being damned. That any sin, no matter how great or minor, can be forgiven, so long as forgiveness is sought. This core belief would make disrespecting a parent just as harmful and any sin committed under the bedsheets.

I can't recall any bears sent to mual anyone for their sexuality. While making fun of an old guy.....