[Ali Imran]

OK but Muhammad also had interactions with Christians 

Prophet Muhammad had interactions with Christians in Medina, most notably with a delegation from Najran. These interactions included peaceful dialogue, allowing them to pray in his mosque, and providing them with accommodation. 

The Najran Delegation:
In 631 CE, a Christian delegation from Najran visited Medina. This group consisted of about 60 people, including scholars and assistants.

Yes, that's true.