The medieval states of Western Europe were hostile to Byzantium. what are the reasons for this attitude?

Most of the feud was associated with religion. The fact is that Christianity was spread both in Byzantium and in European countries. But the denominations were different. Europe had no influence on Byzantium and vice versa. Therefore, there was enmity. This is typical for different confessions of one religion, for example, Christianity, and enmity between countries with different religions. For example – the eastern countries that profess Islam and various European countries dominated by Christianity.