Ebola is a terrible disease that is hard to contain and easily transmitted. So, President Obama made a special exemption for Africans who suffer from it. Illegal immigrants with Ebola can enter the U.S. for humanitarian reasons when Obama included it under the Temporary Protection Status. This status has a way of never getting to the temporary stage.
Again, if it is harmful, dangerous, oppressive then Democrats and liberals are for it. President Trump is taking action to safeguard Americans by revoking this abusive law.