Nothing we say or do will change it. It's nice that Trump's appointed Ambassador to the United Nations is opposed to the decision, but it won't make any real difference. The Nations of the world do not want to be convinced of Jewish Rights to anything in the Land of Israel. And we weaken ourselves by trying to get them to favor us.
In this week's Torah Portion of the week, Balak, it says:
Numbers, Bamidbar 23:7He took up his parable and said, "Balak the king of Moab has brought me from Aram, from the mountains of the east [saying], 'Come, curse Jacob for me and come invoke wrath against Israel.'
זוַיִּשָּׂ֥א מְשָׁל֖וֹ וַיֹּאמַ֑ר מִן־אֲ֠רָ֠ם יַנְחֵ֨נִי בָלָ֤ק מֶֽלֶךְ־מוֹאָב֙ מֵֽהַֽרְרֵי־קֶ֔דֶם לְכָה֙ אָֽרָה־לִּ֣י יַֽעֲקֹ֔ב וּלְכָ֖ה זֹֽעֲמָ֥ה יִשְׂרָאֵֽל:
8How can I curse whom God has not cursed, and how can I invoke wrath if the Lord has not been angered?
חמָ֣ה אֶקֹּ֔ב לֹ֥א קַבֹּ֖ה אֵ֑ל וּמָ֣ה אֶזְעֹ֔ם לֹ֥א זָעַ֖ם יְהֹוָֽה:
9For from their beginning, I see them as mountain peaks, and I behold them as hills; it is a nation that will dwell alone, and will not be reckoned among the nations.
טכִּֽי־מֵרֹ֤אשׁ צֻרִים֙ אֶרְאֶ֔נּוּ וּמִגְּבָע֖וֹת אֲשׁוּרֶ֑נּוּ הֶן־עָם֙ לְבָדָ֣ד יִשְׁכֹּ֔ן וּבַגּוֹיִ֖ם לֹ֥א יִתְחַשָּֽׁב:
This Land was given to the Jewish People by Gd, and that is why it is fertile and rich today. We must thank Gd and not the United Nations or the United States. We must remember that.