We can be angry without sinning (Ephesians 4:26). The anger needs to be kept under control and be rightly directed.
One of the many problems with the current movement in support of Donald Trump as a presidential candidate is that it seems to be motivated largely by immature anger. I've given some examples in previous threads. What I want to focus on here is how misdirected the anger is.
For years now, I've been posting polling data and other evidence demonstrating the corruption of the American people. A lot of political conservatives don't realize how corrupt the American people are, ignore it, or are dishonest about it. But what happens if they get Trump as the Republican nominee? Then what? Then they have to try to get American voters in general, not just Republican primary voters, to choose him over the Democratic alternative. That's unlikely to happen, for reasons I've discussed in many previous threads. Most Americans are liberal or moderate on political issues. They're less conservative than the likes of John Boehner, Mitch McConnell, and Jeb Bush. So, what's the reasoning behind focusing so much anger on people like Boehner and Bush and so little anger on the American people, who are so much worse and who frequently choose leaders like Bill Clinton, Barack Obama, Ted Kennedy, and Nancy Pelosi? The American people aren't illiterate peasants living in mud huts in a medieval monarchy. They're highly responsible for the state of their nation. So, why is the anger of conservatives being so disproportionately directed at individuals like Boehner and Bush? And why do individuals like Ted Cruz, Marco Rubio, and Scott Walker get punished along with the likes of Boehner and Bush?
I hope the current Trump movement, largely fueled by immature anger, is just a very temporary phase, like the ridiculous support we saw for people like Herman Cain and Newt Gingrich in the 2012 cycle. But even if that's the case, it's a waste of time and other resources, it takes attention away from candidates who deserve more attention than Trump, and it may lead to some good candidates dropping out (much as Tim Pawlenty did in 2011), among other problems. In this case, it could motivate a third-party run by Trump that would have disastrous results. Immature anger has consequences, and they're not good, even if the anger feels good for a moment.