Here's my take on the whole issue.
The OP posted a quote on her FB page that reflects her views, opinions, beliefs, etc.. She "proselytized" first to all those who can see her page, right? She put something out there because she wanted people to read it, to reflect on it...to know that she agreed with the sentiment.
Isn't that the whole gist of FB? You post something and then people post feedback. If you post something mundane then you can expect mundane feedback. If you post something a bit more insightful then you should expect responses with a bit more insight in them as well.
For example, if I were to post "I like bananas" on my FB I'd fully expect feedback ranging from a few "Likes" to some "Me toos!" and maybe even a "Blech..bananas are mother nature's refuse".
It's FB, I know the drill..I post something and folks post back what they think of my post. If I'm going to something that reflects my beliefs, faith, political leanings or whatever I'm fully aware that all my "Friends" aren't going to agree with me and then I go put my big girl panties on and accept whatver comments they make...whether I agree with them or not.
If you feel you should be able to put something out there and not have to hear the opinions of those who disagree then certainly don't put it on your FB page.