Not that they became apostles through being chosen for some distinguished peculiarity of nature, since also Judas was chosen along with them. But they were capable of becoming apostles on being chosen by Him who foresees even ultimate issues. Matthias, accordingly, who was not chosen along with them, on showing himself worthy of becoming an apostle, is substituted for Judas.
(Clement of Alexandria)
"God bestows His love on everyone, even those who persecute Him or crucify Him. If you want to imitate Him,then you too should love the people who are a source of suffering and torment for you." (Behold I Stand at the Door and Knock, pg. 87-88)