narrow-minded
US /ˌner.oʊˈmaɪn.dɪd/
UK /ˌner.oʊˈmaɪn.dɪd/

1.
not willing to listen to new ideas or to the opinions of others
:
•
His narrow-minded views on immigration caused a lot of debate.
•
Try not to be so narrow-minded; consider other perspectives.