Abstract
As the world is more globalized and frontiers are constantly more diffused, some sectors of society have the need to underline differences and establish distance from these differences. This seems to be observed in the levels of social exclusion and rejection that members of the gay, lesbian, bisexual and transgender communities receive. From a perspective of evidence based practices and human rights, this article present
the current state of research on sexual discrimination. Individual and institutional homophobia is presented as a key element for discrimination. It is discussed that gender transgression is also a fundamental element for the justification of hate that might lead to homicide. The need for psychology to develop ethical standards for interventions in these communities is presented.
