Please, look again at what synthesis mean, per our policy, and explain me which my statement is not explicitly present in at least one of the sources I use? Until you demonstrated that, you have no ground to blame me in violation of our policy.
In addition, per G. John Ikenberry (Foreign Affairs, Vol. 83, No. 5 (Sep. - Oct., 2004), pp. 164-165) Valentino's "Final solution" is "astute and provocative study", which implies that it is, at least, not fully mainstream. Therefore, it would be absolutely in accordance with our policy to balance Valentino's views with the opinions of other scholars.