You can find whole families out there who've been emotionally living off their ideological commitments for generations.
Politics, ideology, being on the left, say, is the most important thing for them.
But to say that a set of views that you disagree with is always and everywhere in itself a religion is going too far.
“Sure, there are people for whom politics is a religion.”
As a practical matter, there is little external difference between a political zealot and a religious zealot.