I am aware that your opinions on same-sex marriage are based on personal and religious views

It's critical to acknowledge the wide range of viewpoints on this subject and the importance of courteous discussion in promoting understanding. This reply gives credit to your point of view while offering a counterargument:

I appreciate your freedom of speech, and it's obvious that your viewpoint is shaped by your own values and religious views. It's true that opinions on same-sex marriage can differ greatly among people, frequently due to concerns about religion and culture.