"Deep suspicion" refers to a strong feeling or belief that someone or something is not trustworthy or may be involved in dishonest or harmful activities. Full definition
Many have been raised under a certain end - times theology, groomed to harbor deep suspicion of all things Arab. (relevantmagazine.com)
Family planning programmes are viewed with deep suspicion in many parts of the world because their primary goal is to curb population growth, not to meet the personal needs of women and men. (newscientist.com)
Putting a financial value on trees that could otherwise be cut down is viewed with deep suspicion by campaigners, who warn of land grabs and fraudulent accounting in host countries. (climatechangenews.com)