It comes from Satan. He hates anything God loves including Israel and His own Christian believers.
Concerning Israel:
Deuteronomy 7:6 For you are a people holy to the Lord your God. The Lord your God has chosen you out of all the peoples on the face of the earth to be his people, his treasured possession.
7 The Lord did not set his affection on you and choose you because you were more numerous than other peoples, for you were the fewest of all peoples. 8 But it was because the Lord loved you and kept the oath he swore to your ancestors that he brought you out with a mighty hand and redeemed you from the land of slavery, from the power of Pharaoh king of Egypt. 9 Know therefore that the Lord your God is God; he is the faithful God, keeping his covenant of love to a thousand generations of those who love him and keep his commandments. 10 But
those who hate him he will repay to their face by destruction;
he will not be slow to repay to their face those who hate him.
Israel is hated because Satan hates God. Satan is whipping up people to hate who God loves.
Revelation 12:17 Then the dragon was enraged at the woman and went off to wage war against the rest of her offspring—those who keep God’s commands and hold fast their testimony about Jesus.
This includes those in Israel that will eventually realize Lord Jesus is the Messiah.
I personally don't want to hate Israel since God still loves her. I am very much on God's side on that.
Psalm 83:1O God, do not remain silent;
do not turn a deaf ear,
do not stand aloof, O God.
2 See how your enemies growl,
how your foes rear their heads.
3 With cunning they conspire against your people;
they plot against those you cherish.
4 “Come,” they say, “let us destroy them as a nation,
so that Israel’s name is remembered no more.”
I'm not worried though. God will protect Israel whether or not people will acknowledge or believe that.