If someone went up to you and said "if you're ever in the hospital with a terminal illness, lying in an ICU where the only visitors allowed are family, I want to give a hospital administrator who hates you the right to make sure that you die alone, without the person you built a life with or the children you raised" and then worked to bring this about, would you say this person was trying to hurt you?I'm not trying to hurt anyone. You just can't see past your biases.
When you say that you're against same-sex marriage, you're saying this... along with many other hurtful and harmful sentiments. For the people it affects, this isn't just an academic issue. Same-sex marriage solves a huge number of problems - some critical - in the lives of same-sex couples and their families. By opposing same-sex marriage, you're saying that these couples should be forced to suffer through these problems.
Prohibiting same-sex marriage hurts people. If you're trying to prohibit same-sex marriage, you ARE trying to hurt people.