Because that's exactly what's needed. The internet has allowed us to connect and find tribes of our own. People who act, think, and agree with us already. This gift/curse, has allowed us to not allow new inputs, we don't have to consider opinions that may undermine our own.
We all know people who just don't get it. From politicians to colleagues, we can find plenty of examples of someone who doesn't believe, or understand, the fundamental rights of a group that they aren't apart of. Instead of avoiding the conversation, we have to actively engage, and have to make sure we do so meaningfully. Talking about politics and religion is so taboo because no one talks about politics and religion outside of their own comfort zone.
"Immigrants are taking our jobs" until they realize that they are doing the jobs Americans won't do, and are severely taken advantage of.
"Gay people don't deserve rights" Until a family member/close friend is gay; they can finally connect that people are people and don't deserve demonization.
"We're losing our country." Sigh...no we're not.
Empirical evidence does nothing to dissuade the mind of the determined fool. However,hopefully, an emotional connection might.