They did not have the Spirit of Christ and they did not express the biblical definition of love. Here is how we know if anyone loves God -
Deu 11:1
Therefore thou shalt love the LORD thy God, and keep his charge, and his statutes, and his judgments, and his commandments, alway.
Deu 30:16
In that I command thee this day to love the LORD thy God, to walk in his ways, and to keep his commandments and his statutes and his judgments, that thou mayest live and multiply: and the LORD thy God shall bless thee in the land whither thou goest to possess it.
Jhn 14:15
If ye love me, keep my commandments.
Jhn 14:21
He that hath my commandments, and keepeth them, he it is that loveth me: and he that loveth me shall be loved of my Father, and I will love him, and will manifest myself to him.
1Jo 5:3
For this is the love of God, that we keep his commandments: and his commandments are not grievous.
2Jo 1:6
And this is love, that we walk after his commandments. This is the commandment, That, as ye have heard from the beginning, ye should walk in it.