All feelings are acceptable, but not all behaviors. It is necessary to set limits to the children without being too lenient to avoid that the children have insecurity regarding the upbringing that you are providing them every day.
As a parent you need to set limits, the parent-child relationship is not a democracy. Once the emotions are managed, you can be assertive. After the parent recognizes the emotion behind the misbehavior and helps him label it, the parent can make sure the child understands that certain behaviors are inappropriate and cannot be tolerated.
Then, the parent can guide the child to think of more appropriate ways to handle negative feelings. "You're angry because Lucas took that game away from you," the father might say. "I would be too. But it's not okay for you to hit him. What can you do instead of esti? "
After you've listened with empathy, labeled feelings, and set limits on any misbehavior, it's time to fix things. Someone needs to lead the resolution of the problem. And that person is not you.
This is another skill that you want to help them develop. You won't always be there to tell them what to do. So motivate your children to come up with ideas, guide them to a solution in line with their values that is effective and takes other people's feelings into account. This is how emotionally intelligent children grow into resourceful and responsible children.
Your children need you to breathe deeply over and over again to educate them from patience, but above all, from respect. They need you to respect them, to love them and not to forget that they look at you every day to learn more than from your words, your deeds and everything you do to them every day.