The Torah verses under discussion where composed around the post-exile era, when the Jews lived in Babylon or shortly after the rebuilding of the Second Temple had begun. They weren't really uttered to Moses from God millennia ago during the legendary narrative of Israel's 40-year trek through the wilderness.
They reflect an attempt by the Jews to understand how to be just in the world around them. Jews are not of the opinion that God really stated the actual words in these laws, telling us it's okay to have slaves. Some Christians believe that, and you seem to believe their take on the matter, be we Jews don't.
The Jews have struggled through the ages to understand and apply the principle of Tikkun Olam, which is basically trying to see clearly now to act right in and toward the world and it's inhabitants. Over the ages Torah has reflected the mores of society in which they developed, changing and even being discarded as our religious view evolved.
God has been against subjugation of anyone since the beginning of history, and Jewish Scripture is but an ancient snapshot of how Torah was understood at the time of their composition. Many of these biblical laws were discarded by Judaism centuries before Christ. The Midrash and then the Talmud took up the cloak of presenting Torah after this.
The Scriptures often use particular language to claim that God permitted certain behaviors and practices, attributing things like slavery to God. But Jews know this was not really the case. The Biblical record is neither historical nor are all the commands within really from Heaven.
We don't view the Bible in these terms about slavery in the way you believe. You repeating Christian theology and starting it represents Jewish thought is not a way to prove your point. It only shows you lack of exposure to Hebrew thought.