[bigheadfred]

Unification is a goal of Physics, obviously

So much so they made it a religion.

[HiTech RedNeck]

It’s easy to confuse a portrait with the Painter.

[FredZarguna]

It's not a religion, unless you're saying the goal is pursued so single-mindedly and without regard for its plausibility that it takes on the aspects of zealotry.

However, we actually have good reasons for believing unification is possible. One such reason concerns gravity: the inertial mass and the gravitational mass appear to always be the same in every case that we know (Equivalence Principle of General Relativity.) That supports the idea that mass is a universal property of all particles, including the gauge bosons, and since they all "experience" this force, all those forces must be related.