Can Communication Difficulties Affect Behaviour?

The answer of your question is in positive. Yes certainly difficulties in communication affect our behavior. There are chances that the problems and difficulties which we're facing in communication would affect our behavior on different levels. For example if we are facing just a slight problem in our communication then we get a little disturb while if we're facing some serious problem in communicating our message to someone then it can cause really a high level of irritation. For example if you're telling something to someone and he/she is not listening it attentively then in this case you'll be outrageous very soon. So this is the best example of affecting our behavior by the communication difficulties.

So you easily understand from the example and the explanation given above that communication difficulties and problems which we face during communicating our messages they can cause disturbance, harm and irritation in our behavior and attitude. I hope this answer is enough for you to understand how communication difficulties affect our behavior. Thanks for asking such a nice question. Keep asking.

Absolutely, look at toddlers, just learning.  When they can not be understood or can't understand, it makes them cranky and unhappy.
Lot's of people don't get that, and they punish the child's behavior. If people can not understand or communicate, then social and cultural differences may cause assumptions, and misunderstandings.  People often act out, according to their opinions, assumptions, and such.  Often it creates mistrust and hostility.