Islam also prohibits, adultery, zina, drinking alcohol, etc are you going to claim that this also comes under "forcing our religious beliefs" on others ? Being able to practice to islam in a secular nation doesn't mean or entail that you support that which is prohibited in islam.
Yes, those things are haram but I am not going to stop people from doing those things in a Western country. That is my underlying point.
I support their right to drink, do zina in their own country. I will not do those things and will not want my family to do it.
The same goes for LGBT, I support their right to do it in a secular country which supposed to provide rights for everybody. However, I am not going to partake or support or not support them.