The groups said they opposed the protest peacefully. However, the warning raises concerns about the Brexit situation on the island of Ireland.
Brexit: Separation of United Kingdom and European Union takes effect
Northern Ireland is part of the United Kingdom, but on the same island as Ireland, an independent country.
For decades in Northern Ireland, there has been civil strife between those who want to secede from other parts of the United Kingdom and those who want to stay.
After three decades of struggle, a peace treaty was signed in 1998, also known as the Belfast Agreement or the Good Friday Agreement.
Loyal paramilitaries told the UK they were concerned about the problems Brexit had caused in the trade – in Northern Ireland, some products had stopped coming (see below).
They sent a letter to Boris Johnson.
The opposition said it was peaceful, but said: “Do not underestimate the power of this sentiment in the Unionist family on this issue.
The paramilitaries said they would only support the terms of the 1998 peace agreement when trade issues between Northern Ireland and the United Kingdom were resolved.
The rest of the United Kingdom violated their 1998 agreement.
Brexit’s biggest challenge was to maintain peace in Northern Ireland.
For him there are no barriers between Northern Ireland and Ireland. The problem is that Ireland is part of the European Union.
Therefore, goods and people can cross the border between Ireland and Northern Ireland without restriction.
When Brexit comes into effect from 2021, Northern Ireland will have trouble importing many goods from the island of Great Britain.