No, it's not okay to be transphobic. Transphobia is prejudice or discrimination directed against transgender people. It can take many forms, from name-calling and misgendering to violence and exclusion.
Here's why transphobia is harmful:
It can lead to mental health problems for transgender people, who already face high rates of depression, anxiety, and suicide.
It creates a climate of fear and hostility that makes it difficult for transgender people to live safely and authentically.
It's based on misconceptions and stereotypes about gender identity.
If you're struggling with understanding transgender identities, there are many resources available to help you learn more. Here are some:
The Trevor Project:
https://www.thetrevorproject.org/GLAAD:
https://glaad.org/ 
