be like a bull in a china shop
To be aggressive and clumsy in a situation that requires delicacy and care. My son is always like a bull in a china shop, so I'm worried about taking him to the museum. Surrounding him with valuables does not seem like a wise idea! This is a complex problem, and if you attack it like a bull in a china shop, you will alienate a lot of people.
like a bull in a china shop behaving recklessly and clumsily in a place or situation where you are likely to cause damage or injury.
like a ˌbull in a ˈchina shop very careless or clumsy, especially in a situation where you need to be careful: He was like a bull in a china shop, treading on everyone’s feet and apologizing constantly. ♢ The Prime Minister went into the negotiations like a bull in a china shop and only made the relations between the two countries worse.