Why does the LGBTQ community convince everyone in their community that society needs to be accepting of their relationships?

I have no problems with their relationships in general, but I feel like the group risked is contradicting. They convince their people within the community that society as a whole needs to be accepting of their relationship or else. Like why not just accept your own relationship and live how you want? I’m sure a lot of people are unaccepting of my heterosexual relationship and I don’t care
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I feel like the group is contradicting ***
Why does the LGBTQ community convince everyone in their community that society needs to be accepting of their relationships?
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