God's purposes mean that He does as He pleases, with whom He pleases, and when He pleases. As it says in
Psalm 135:6
"Whatever the Lord pleases, He does, in heaven and on earth, in the seas and all deeps.".
And Daniel 4:34-35
"At the end of the days I, Nebuchadnezzar, lifted my eyes to heaven, and my reason returned to me, and I blessed the Most High, and praised and honored him who lives forever, for his dominion is an everlasting dominion, and his kingdom endures from generation to generation; the inhabitants of the earth are accounted as nothing, and he does according to his will among the host of heaven and among the inhabitants of the earth; and none can stay his hand or say to him, “What have you done?”"
Of course God does as He pleases. That is not the point. You don't know that it's God's will for Islam to take over England or the U.S. Do you? Maybe it's God's will, maybe it isn't. That's up to Him.
I move according to that which I know. I know Islam is against God and Jesus Christ and Christians. I know their purpose. And i contend with them, am against them, in that purpose.
What you are saying is that because God is going to do what He wants, you do nothing. I assure you that is not the will of God. Leave to God what He wants to do, and make sure you are found contending, fighting, against His enemies. Not for them.
Quantrill