You did the right thing, sis.
Threats no matter how little it may seem should always be taken seriously, in my opinion.
Now what's left is to pray for the person.
I pray that our Heavenly Father will have mercy on that person and may He help soften that person's heart and reveal His truth in His time. May He also open that person's heart and mind to consider and accept His truth in His Son. In the Name of Jesus Christ we ask these things..Amen.
3nodding As random as that person may have been to comment on your profile, perhaps it is God's will that we are aware of that person and that we pray for their soul.
: )
May the Lord also protect you and keep you safe from any human threats. In Jesus' Name we ask these things..Amen.
emotion_bigheart