The Catholic Church's teaching on the subject of homosexual acts is identical to the teaching of the Orthodox Churches, mainstream Islam and traditional Judaism. For example, Patriarch Kirill is, if anything, more adamant on the subject than any recent Pope has been. 

The Catholic Church's teachings on the completely unrelated subjects of divorce and contraception are slightly different from other these religious traditions. But these teachings have in no way isolated the Church. Take a look at the pictures of the Pope with Patriarch Bartholomew; that is not a picture of isolation.