Broken Diffuse Lighting vertex shader

#version 330

layout(location = 0) in vec4 position;
layout(location = 2) in vec3 normal;

uniform vec3 dirToLightSource;
uniform vec4 lightIntensity;

uniform mat4 cameraToClipMatrix;
uniform mat4 modelToCameraMatrix;
uniform mat3 normalModelToCameraMatrix;

uniform vec4 color;

out vec4 theColor;

void main()
{
	gl_Position = (modelToCameraMatrix * position);

	vec3 normCamSpace = normalize(modelToCameraMatrix * vec4(normal, 0)).xyz;

	float cosAngIncidence = dot(normCamSpace, dirToLightSource);
	cosAngIncidence = clamp(cosAngIncidence, 0.0, 1.0);

	theColor = lightIntensity * color * cosAngIncidence;
	theColor = vec4(normCamSpace, 1);
}