Whom does Hashem love more: Gentiles who love Jewish people and Israel or Jews who are against Jewish people and Israel?
Just as a first crack at this (and there is a lot more to say on the topic), we need to distinguish between different kinds of love. In human terms, a person loves their spouse, their children, and their close friends; but each of these is of a different type. Some of these may be "a love dependent on an external factor," others, "a love not dependent on such factors" (see Ethics of the Fathers 5:16).
In somewhat the same way (to the extent that we can apply human terms to G-d at all), there is a difference between a Jew - who, as low as he or she may have fallen, is still a Jew and a "child of G-d" (Deut. 14:1 and R' Meir in Talmud, Kiddushin 36a, explaining this verse), and with whom He therefore has a supra-rational and indissoluble bond -
versus a non-Jew, who does not have that special relationship (although it is of course true that G-d appreciates and rewards his or her good deeds - see Talmud, Bava Kamma 38b).
Fascinating question. I would like to clarify a few things. First, I would like to make explicitly clear what you mean by "Hashem Loves more". In a strict sense Hashem does not love. He being perfect does not have any emotions. The Rambam states in the Moreh Nevuchim, Book I, Chapter 55 that no change or emotion can ever be predicated of Hashem. As the Novie states in Malachi Perek Gimmel, Pasuk Vov, "I, G-d, do not change." Rambam states in the Yad, Laws Concerning the Fundementals of our Faith, Perek Alef, Halacha Yud Alef, "and He does not change, for there is nothing that can cause change in him. There does not exist in him... anger or laughter, happiness or sadness…"
Therefore we can not say that Hashem loves us, that would be attributing an emotion to Hashem.
However, I believe your fundemental question is to identify which person is considered on a higher level before Hashem. An Idolater who loves Jews or a Jewish person that hates Jews. This is a challenging question, because the idolater is far from reality and the truth in that he has a false idea about God. The hating Jew must also be distorting the truth in order to hate the Jewish people. So, both are distant form reality. One would need to delve further to understand why it is that the non-Jews loves the Jews and why the Hating Jew hates other Jews? What is the basis for the hate, Perhaps if one is more correctable, then they may be in a better position to change. Just a few thoughts to address your question, let me know if you have any follow up questions.
who does a father love more? his own children or someone else's?