Basically their point was: When some asks “what is love?” (Baby don’t hurt me! I couldn’t resist the reference sorry) and someone says “Love is love” it doesn’t explain anything (like when the definition of something is a circle, ya know?). And the “why tolerance is dumb” is; why is it tolerance? Shouldn’t it be acceptance, because tolerance means “I guess I won’t hurt you but I won’t like you” so they were saying it should actually be acceptance or something like that but tolerance.
The love is love was basically them being upset at all of the explanations of love they got.