It has a Protestant majority with a substantial Catholic minority, but is essentially a secular state. Northern Ireland is currently a majority Protestant country. However this appears to be changing, and it is predicted that in 15 - 20 years, there will be more Catholics than Protestants in Northern Ireland.

Introduction:
The Catholic Christians of Northern Ireland have a unique history and experience that sets them apart from other Catholic communities around the world. Northern Ireland is known for its religious and political divide between Catholics and Protestants, which has shaped the experiences of the Catholic community in the region.

Explanation:
Poverty:
The statement that Catholic Christians in Northern Ireland are likely to be poor is correct. Historically, Catholics in Northern Ireland have faced socio-economic disadvantages compared to their Protestant counterparts. This can be attributed to a variety of factors, including discrimination in employment, housing, and access to education. These systemic inequalities have contributed to higher poverty rates among the Catholic community.

Discrimination:
The statement that Catholic Christians in Northern Ireland may have suffered a history of discrimination is also correct. The region has a long-standing history of sectarian tensions between Catholics and Protestants. Discrimination against Catholics has been prevalent in various aspects of life, including employment, housing, education, and political representation. This discrimination has resulted in social and economic disadvantages for the Catholic community.

Peaceful Coexistence:
The statement that Catholics have lived peacefully with Protestants in Northern Ireland is incorrect. The region has experienced significant religious and political conflict, often referred to as "The Troubles," which lasted from the late 1960s until the signing of the Good Friday Agreement in 1998. During this time, sectarian violence between Catholics and Protestants was widespread, resulting in thousands of deaths and injuries. While there have been efforts to promote peaceful coexistence and reconciliation since the Good Friday Agreement, the legacy of past conflicts and ongoing sectarian tensions continue to impact the relationship between the two communities.

Conclusion:
In conclusion, the Catholic Christians of Northern Ireland have faced socio-economic disadvantages and discrimination throughout their history. However, the statement that they have lived peacefully with Protestants is incorrect, as the region has a complex history of sectarian conflict. It is important to consider the unique context of Northern Ireland when discussing the experiences of Catholic Christians in the region.

All the points are incorrect so answer is D all the above