the melting pot analogy does not conform to modern liberalism

THE 'AMERICA IS A MELTING POT' ANALOGY IS MORE OF A CONSERVATIVE ANALOGY THAN A LIBERAL ONE AT THIS POINT; CONSERVATIVES WANT TO ADD AN APPROPRIATE AMOUNT OF THE RIGHT MATERIALS AT THE RIGHT TIME IF THE SITUATION REQUIRES IT TO MAKE THE CORRECT END PRODUCT; LIBERALS WANT TO DUMP 80LBS OF RANDOM MATERIALS INTO A 20LB POT ...BUT QUESTIONING THE LOGIC, MATHS AND CHEMISTRY OF DOING THAT IS RACIST