Limited atonement is the hardest doctrine of Calvinism to accept. For this reason, there are four-point Calvinists:
What is Amyraldism / Four-Point Calvinism? | GotQuestions.org
Everyone limits the atonement in some way. Those who believe in unlimited atonement limit the atonement’s power, that Jesus died for people who end up in hell.
Those who believe in limited atonement limit its extent, that Jesus died only for His elect, who will without fail be saved, so not a drop of Jesus’ blood was wasted.
In His torture and death, Jesus suffered the full measure of God’s wrath for sin. Limited atonement means that not an iota of Jesus’ suffering was endured in vain.
If you truly care about the salvation of the lost, you should support evangelism, since the preaching of the Gospel is the means God has ordained to awaken faith in His elect. Some of the greatest missionaries have been Calvinists.
Until they repent and believe, it's impossible to tell who God's elect might be, so the Gospel must be preached indiscriminately. Matthew 28:19, Mark 16:15, Luke 14:23