I'm an Iraqi Canadian with a Muslim name, so I know a little more than the average person about this issue.
I can tell you that what Trump is doing is unequivocally worse than what Obama did. One of the things Obama did when he became president was make it easier for nationals of several Arab countries (including Iraq) to travel into the United States.
After the 9/11 attacks, the Bush administration required travellers from a number of Arab countries to disclose their travel plans at entry. It also placed limitations on their movement within the US. Obama and the Democrats waived that requirement. Unfortunately I can't remember the name of this law, and I couldn't find it now. If you can find it and comment with the name, I'd greatly appreciate it. (see update below)
What Obama did in 2015 might have been negative for Arabs who come from the nations affected, but he still left the process better than he had received it.
Also, he didn't campaign on banning Muslims from entering the US, didn't thoughtlessly keep out Green Card holders and dual citizens, didn't say "Islam doesn't like us".
There is no comparison between Obama and Trump.
Edit: it was NSEERS. https://en.wikipedia.org/wiki/National_Security_Entry-Exit_R...
I should point out I'm not criticizing your opinion, which is entirely valid. Just pointing out how I see it myself.