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You will become what you hate, given that you assume a label-defining role of someone-that-you-hate. [ Given that we share many roles with one another, you will assume the role eventually. ] And by the time you've undergone any transformation, your decision to be what you once hated is justified, and you may not even hate it anymore. Any action that you once disliked, or dislike now, may be necessary at some point. And it may be necessary for you to be the perpetrator. Of course, by then you probably won't see yourself as such.
But the relativity from past-selves to future-selves reveals that the offense committed is generally as contrived as the offense taken.
Though maybe, the critical stance is better to take, on general principles. You're no more entitled to indulgences now as you were before as you will be. Young self-interest, as contrived as it may be in this relativistic schism, and the discontent in having taken offense at least serve to highlight the indulgences of the old self-entitled.
On the bright side it's unlikely you'll become everything you hate.