The phrase "growing hostility" means that the unfriendly or hostile feelings towards someone or something are increasing or becoming stronger over time. Full definition
He tells me that the vulnerability of the current stopping places and growing hostility means that travellers band together into bigger groups for safety — compounding the problem. (politics.co.uk)
She was born in Queens of Colombian immigrant parents, speaks fluent Spanish, and will fight for immigrants» rights in the face of growing hostility from Washington. (noidcny.org)
But it should be kept in mind that among our own conservatives, there is a home - grown hostility towards the UN which emerged in the late 1990s in the Australian campaign against the UN's human rights system.2 The criticisms by the Howard Government of the UN human rights system and the calls for it to be reformed were driven by anger and embarrassment at international condemnation of Australia's treatment of asylum seekers and inability to solve the problems of Indigenous disadvantage. (clivehamilton.com)