Because of what the people did to Jesus when they crucified him. God even today carries a burden of guilt of which he continues with today because of how humanity had Jesus put to death, more so when Peter denied him and Judas informed on him.
Oh yes God loves the people in a way but he is very angry and very often tells me how much he dislikes human beings and in they way they conduct themselves, and in the way they use Jesus as a scape goat because they admit they are all sinners; and have not got the courage to face their sinfull ways but do continue to place them onto Jesus back. This he is very angry about and he will always be this way.
This messgage has been hanging around me for years and I have held it back as long as I can because of what else came with it of which I am still reluctant to disclose.
Fortunately God is forgiving, and when he has forgiven them, then he administers his Justice.