Creating Achdus is tricky, and might require some good tricks, too. You can’t enter an argument and yell Achdus. What are you even picturing as the desired outcome?
Aharin Hakohen used a trick on small scale arguments. Duh the big one he fell on his face. Disagreements are explosive. פוטר מים ראשית מדון. While it is possible to disagree without hate, it is very dangerous and extremely prone to break open.
People often imagine that they’ll have the last word when they are “Mocheh” sharply. That their shocking, inflammatory words will bring the other side in line and all will end well. Hardly does it come into consideration that the other side will simply receive the message as hate and will respond in kind. Guess what happens next.
Calling yourself a נרדף as a winning technique doesn’t mean you are more peaceful. If you truly want peace, it takes great diligence, a lot of pic picture thinking, compete self control and then, if you’re lucky it can subside after some time.