Don’t get manipulated into doing something you wouldn’t otherwise do.
Calling someone out for trying to make you feel committed towards their cause will make them stop. Analyzing the motivations behind your decisions will help you understand whether it is the right decision to make.
If someone tries to trigger a feeling of commitment in you, call them out on it.
Simply inform them that you are aware they are trying to make you feel committed towards their cause; however, as you would not normally agree to their request, you will not be doing so now.
Before making a decision, consider your motivations.
Do you want to make a certain decision because you feel like it is the right decision, or because you feel like you need to remain consistent with your earlier decisions?