I all for happy Jews who celebrate everyday when they see a miracle..since everything around is a miracle and Gd and perfect. But there are times to be happy and times to be sad and times to be angry and times to forgive. It seems to me from my current observation of them, all they want to do is be happy. But then what will they do during wartime? Or Gd forbid, death due to enemies winning wars against the Jewish people. Is it a time to celebrate still? We can't live with our brains in the clouds 24/7 and not do our part. We have to use our free will to do our part and do the right thing and everyday is a test by Gd. And no matter what the outcome is our lifetime for working hard to do our part to be righteous, we can only know that the outcomes from our actions, good or bad, is meant to happen for whatever Gd wanted it to be. And I think that's where the happy part should be. Because Gd does things on purpose and for a reason, whether we like it or not, we should be happy that Gd is there and does everything for the best.....i hope that made sense.
I think I understand what you are saying. And indeed the Breslevers, at least the more rational ones, realize that there is a need to fight in order to win. Everything is not Happy, Happy as you imply.
But the key thing to concentrate on, from the Breslev perspective, is the concept which Rabbi Nachman taught "Kol HaOlam Kulo, Gesher Tzar Meod" or "Life is a narrow bridge, and the main thing is not to fear at all". The concept means that we must have complete faith in Hashems wisdom in order to merit his intervention of strengthening us against our enemies. This is the Breslov and most Chassidic strategy against all enemies.
As we learn in this weeks Parsha that Hashem is the one who blesses us, and he is also the one who curses us, as evidenced by the Tochacha {Rebuke} in Parasha Ki Tavo.
As with all large movements and groups there are outliers who use the identity for their own purposes, and often projecting a distorted view. While dancing and spreading joy is important there are many other mitzvot which are not always joyous. But again I believe the strength of Breslev is the idea that we should find something joyous in our service of our G-d. Through this {as our portion says} we merit Hashems Divine presence amongst us.