Infighting
1)When you and/or someone else Criticize a friend or a Political Party, or a News organization that
lean towards your political affiliation, but
don't agree on specifics and practicalities that fit your
niche of that political affiliation.
In other words, you have the same
broad worldview of how things should be but you disagree on the specifics.
2)One might blame another for "shooting in the tent" when he criticizes and chastises members of his own political party while the opponents of said party can gain power on the back of "Infighting".
The metaphor is for a guy that has a guy in a tent and has beef with one
person and tries to shoot him while endangering his friends as well.
"Man, you really have to stop Shooting in the tent. we're all on the same side after all."
"You
don't have to agree 100% and still
work for the bigger
issues.
But if you keep shooting in the tent you will bring all of us down!"