As you might expect, he came to some harsh, ugly criticism from a small, harsh and ugly segment. Yet he defended his statement with thoughtfulness and graciousness -- even offering free baseball tickets to some fans who disagreed with him. He was a good guy with the Cubs and remains so. Just, alas, for the wrong team...
How good a guy is Dexter Fowler? Even though he left the Cubs and even though (worse) he went to the hated St. Louis Cardinals, several fans put together thank you "appreciation videos" to him. Here's one of the nicest. If you don't want to watch all the baseball highlights, just jump to the 4:20 mark to see him talk with Bill Murray and then address the mass of fans at the Cubs victory rally.
So, even if you supported the travel ban for your own personal reasons, if you can't disagree someone as good as Dexter Fowler (who, again, has a wife from Iran) without being ugly about, that speaks solely about you and not the issue at hand. And most definitely not about Dexter Fowler.
Even if he's on the wrong team.