Communists don't crave power, and if your only point to that is that we recognize the necessity of employing state power against literal fascists, landlords, capitalists, sabateurs, etc, then you're implicitly making the point that we should let these groups run free for a sense of greater "freedom," even if these groups murder us and re-establish the very system that so immiserated us to the point of revolution in the first place. You're handcuffing yourself.
In reality, communists become so because of disaffections with present capitalist systems, and seek answers from Marx, Engels, Lenin, etc. The fact that some party members are opportunists doesn't make that a fact of communism. This kind of psycho-analysis doesn't hold any water when measured against real communist movements, both in successful socialist nations and in communist parties in capitalist nations.