...people would trust ICC as fair institution of law. Not a imperial tool.
This idea of the ICC as an imperial tool is an interesting one. Let's review some facts:
(a) Most of people on trial or wanted for trial are Africans.
(b) That is because almost all of them have been sent there by their fellow Africans.
(c) During the period that the AU "leaders" (at its Extraordinary summits etc.) has been busy denouncing the court in terms similar to yours:
- Some of those places have engaged in (b). (A spectacular example being Museveni: after all his vitriol, he handed over Ong'wen. He has since then gone rather quiet on the ICC.)
- Numerous threats of withdrawal, individual (e.g. by Kenya) or mass (by AU "leaders") have turned out to be nothing but noise. On the contrary, more African countries have signed up.
- A guy like Ntanganda decided that he'd rather go there than face his fellow Africans.
(d) At the 2014 Assembly of States Parties, the keynote speech was given by the president of the CAR. She lavished praise on the ICC for "intervening" in the CAR. Everyone clapped and cheered.
(e) The Senegalese, Kaba, was elected president of the ASP. The African delegates were beside themselves with delight. No talk about imperial tools or mass withdrawals.
(f) As is standard practice with the AU, all that they resolved (especially in 2013) to do about the ICC has quietly been forgotten.
So, at a first cut, we may conclude that: (1) All the noise about "imperial tool" is simple, manipulative bullshit by countries that most find that "tool" useful; or
(2) African leaders know when they are targets of "imperial tools", will make plenty of noise about it, but will then eagerly submit.
Neither is very "positive".