Where does all the negativity toward Christianity come from?

I am sure this question has been asked before, but if so I missed the answers. I am sincerely asking what has happened to you personally to make you feel such anger towards those of us who do follow Jesus and believe in Him. I know that there are some Christians that are over the top and can get very ugly in the name of religion, but I have not personally met any, only seen them on here. But I really don't understand what causes all the negative feelings and hateful words, blasphemous remarks and attitudes to believers. Even though we will never meet, it truly saddens me to read some of the remarks on here.