“As for you, Oh house of Israel, thus says the Lord Yahweh, Go you. Serve every one his idols, now and hereafter if you will not listen to me. But you will no more profane my holy name with your gifts and with your idols.”
For the present those listening had a choice. They must choose between Him and idols. But they could not have both. If they wished to choose idols let them serve them, both now and later, but let them not then come to Yahweh with gifts or associate Him with idols. Then they would be in contrast to those who yet will serve Him purely (Ezekiel 20:40). They would reveal themselves not to be His people.