Why should I have to tolerate ignorance? There's enough of it in this world, and it probably won't stop even if it's being fought, but it definitely won't stop if the people who try to avoid ignorant views simply roll over to it.
One person's ignorance is another's enlightenment. You're going to have a long road ahead of you if you engage everyone who, by your own judgement, has been deemed ignorant. You will rarely change someone's mind with words anyway... actions are much more effective.