Vegans and vegetarians are often [wrongly] accused of forcing their opinions on others, when nothing could be further from the truth.
Carnists are the ones forcing their opinions on the animals, by purchasing meat and animal products from the supermarket. Animals are forced into slaughterhouses and executed against their will due to market demand from meat eaters.
Vegans and vegetarians do not force their opinions on meat eaters any more than the abolitionists forced their opinions onto slave owners. The slave owners were the ones forcing their will onto the slaves, and the abolitionists were trying convince them to set the slaves free.
What an upside down world we live in, eh?
P.S. If you're terrified at the thought of a technologically advanced race of beings rearing and slaughtering humans for food, you should reconsider rearing and slaughtering animals for food. What goes around usually comes back around.