The sunken cost fallacy is when a person is reluctant to abandon a strategy or course of action because they have invested heavily in it. We've spent $100,000 we can't stop now but it can be more insidious than that.
Someone tells you trans people are corrupting children and you believe them. You post horrible things, you protest, you support politicians who will attack, and you feel like you've done good. Then they tell you that it's not just trans people but all of LGBTQ+ and either you were fooled and a monster to innocent people or you choose to hate because that's easier, safer.
Then they tell you who to hate next - that's the sunken cost fallacy.
headshot:
When a politician builds his course on hatred of a certain cohort of people, it is disgusting. People with weak critical thinking abilities always need to hate or condemn someone. Because this is the easiest topic to discuss, not like economics, education, personal responsibility