Differs in political beliefs were arguably the main factor.
There are many different theories and explanations to answer this question, I would suggest reading John Lewis Gaddis' 'Cold War' book.
The effects of WW11 visited heavily on the USSR. The US was kind of seen as a visitor to the war, one that never suffer first hand effects. The US never fully trusted the USSR after it sign a treaty with the Germans.
This was also because of the possibility of USA and USSR fighting each other, and especially during the times when the tensions between those super powers were already high and both had military strength and atomic bombs. And during the times Britain, France, and USA were figuring out who should control the Suez Canal. And because USA didnt want to help an already communist country
The USSR and the US harbored mutual hostility primarily due to ideological differences, with the US promoting capitalism and democracy while the USSR advocated for communism and a one-party state. The aftermath of World War II exacerbated tensions as both nations sought to expand their influence globally, leading to a power struggle known as the Cold War. This rivalry was marked by arms races, proxy wars, and intense political propaganda, as each side viewed the other as a threat to its way of life and global stability. The fear of nuclear annihilation further fueled their animosity, creating a pervasive atmosphere of distrust.
During the Cold War, the US and the USSR employed propaganda to promote their ideologies and discredit each other. The US emphasized themes of freedom, democracy, and the capitalist way of life, using media, films, and cultural exchanges to project a positive image. Conversely, the USSR focused on the strengths of communism, portraying it as a solution to social inequality and imperialism, while depicting the US as a capitalist aggressor. Both sides utilized posters, films, and radio broadcasts to sway public opinion domestically and internationally.
During the Cold War, the U.S. and USSR actively competed through a variety of means, including military buildup, particularly in nuclear arsenals, and competing political ideologies—capitalism versus communism. This rivalry manifested in proxy wars, such as those in Korea and Vietnam, where each superpower supported opposing sides. Additionally, both nations engaged in a space race, culminating in significant achievements like the U.S. moon landing and the launch of the Soviet Sputnik satellite. Propaganda and espionage were also key tools in this ideological battle for global influence.
The Potsdam Conference in July-August 1945 highlighted growing tensions between the US and the USSR as the two superpowers clashed over post-war European reconstruction and the fate of Germany. Disagreements emerged regarding the governance of Eastern Europe, with the US advocating for democratic elections while the USSR sought to expand its influence through communist regimes. The failure to reconcile these differences foreshadowed the ideological divide that would characterize the Cold War, as each side viewed the other's actions with suspicion and hostility. Ultimately, the conference marked a significant turning point in US-Soviet relations, setting the stage for future conflicts.
they didnt trust each other, after all they had debatedly opposite forms of government
The US and the USSR never fought against each other.
Answer1 Germany and USSR would not start war against each other. 2 Germany and USSR will help each other in military and economics.3 Germany and USSR will distribute Eastern Europe counries between each other . So Germany will get most of Poland, while USSR get other part of Poland, Baltic states, Finland and Moldova.
when two people unit with each other as one and belive in each other with trust and faith.
You don't trust each other but want to stay together...then you both must live with the fact that you do not trust each other. That will cause each of you untold pain and hurt all of the time. What is the reason for not trusting each other. I believe your answer lies there.
Trust and Honesty If you are comfortable with each other and can be silly in front of each other, if you trust each other and are loyal, honest and committed to one another.
To defend themselves from each other.
you
They're supposed to, and you can't have a marriage WITHOUT trust. If they don't trust each other, it's usually because they have controlling personalities and always feel they have to be in charge, or they've been betrayed by each other and feel they can never trust again.
they didnt like each other
the two objects didnt hit each other.
they fell out and didnt like each other