I just try to look at Christ's example. He accomplished EVERYTHING calmly, with loving words of wisdom and peace in His heart.
Are you willing to allow Scripture to adjust your thinking? The above isn't exactly reflective of biblical revelation of Christ, it just is not accurate. Luke 11:37-54. John 8:39-47 among other NT passages paint, not a different story, they paint the rest of the story and give us the big picture.
Then as he is YHWH in the OT Scriptures, and is immutable, we see this same God execute his justice and wrath on others by his own Sovereign decree and counsel. He is immutable and we must consider this when we study his attributes.
If we think Jesus as this always calm person in the NT, then just keep turning in your Bible to the right, keep on turning more to the right, get to the book of Revelation, and witness these same attributes of God.
Nothing against anyone, but we really need to be reading our Scriptures. If our concept of Christ is so truncated, how will we know the truth that sanctifies, John 17:17, and sets free, John 8:31-32 with an incomplete, and therefore not exactly biblical picture?
Jesus wasn't just spinning his wheels and giving fodder to the biblical narrative when he expressed his anger plainly in the NT and OT. These are there as truths for us to believe, embrace, to speak and to study.