Doubtful. I had to reread the OP to see why you'd think that, and it looks more to be a reaffirmation that the Boers are God's children, not excluding anyone. Think of it as the Jews or Christians being God's children, but of course that doesn't exclude anyone, under the idea that "Everyone who loves is born of God." (1 John 4:7)
@DavidSouth -- what's the background behind this prayer? I know very little about the Boers, just a bit about the pre-WWI Boer Wars.
So, I am also an Afrikaner (a Boer in other words) living in South Africa. So for a little background:
The Afrikaners are the descendants of Dutch, German and French Huguenot ancestors (with a smattering of others and some early intermarriages) stemming from the colonisation of the Cape starting in 1652. The French especially were fleeing persecution for their Protestant faith after France revoked the edict of Nantes and began persecuting Protestants. The population creolised and developed their own language, Afrikaans.
Britain took over the Cape, prompting some of these to leave on account of taxation issues and perceived British Oppression (notably the hanging at Slagtersnek). This was the Great Trek of 1830, from where they settled the hinterland of South Africa to found their own Boer republics. These properly are the Boers, with whom Britain fought the two Boer wars.
They thought of themselves as having a lifestyle like the old Patriarchs of the Bible, and took the idea of being the 'New Israel' very seriously.
A group of them went to Natal and negotiated with the Zulu King Dingane for land, but he treacherously murdered an unarmed party under Piet Retief at a supposed friendly celebration. Subsequently Dingane tried to destroy all the Boers in Natal, but a small group of about 480, managed to defeat a Zulu force of 15000 at the Battle of Blood River. They had made a wagon laager and then withstood a day of Zulu onslaught until the river ran red with blood, hence the name. Before this battle, they had dedicated themselves to God and a New Covenant, if they were to be saved from the Zulus. The unlikely victory made the day (16 December) a solemn religious Boer holiday that was kept henceforth.
After Britain conquered the two Boer Republics set up in the hinterland (and annexing Natalia set up in Natal), these along with the British Cape Colony were combined into South Africa in 1910. The Cape population and the Boers came to regard themselves as one people again, the Afrikaners. Subsequently Apartheid was made law in South Africa and propogated by Afrikaner controlled governments (Apartheid is Afrikaans for Segregation, and is very much analogous). This ended in '94 when majority rule was instituted. The old Apartheid government had been overtly religious (at least on the outside) with the various Dutch Reformed Churches essentially acting as State Churches, and religious holidays became state holidays, with things like inappropriate contentography or overt blasphemy banned (such as banning Jesus Christ Superstar musical). The Apartheid goverment instuted discriminatory practices against the black majority, like curfews, pass-books, segregated utilities, no go areas, only allowing black land ownership in certain areas, etc.
Since '94 there has been a lot of anti-Afrikaans events in South Africa. Afrikaans schools were forced to become English or dual medium, prayer and Afrikaans cultural expression has been curtailed somewhat, religious holidays apart from Christmas and Easter abolished, and discrimination in employment and university placement instituted against Afrikaners as 'previously advantaged'.
There are also ongoing attempts to force the farmers off their land for Land Reform, recently they have been planning to do so without compensation. Much of this land has been in Afrikaans ownership for centuries, and significant portions legally bought from previous tribes or empty land settled (just prior to the Great Trek, the rise of the Zulu Kingdom prompted a largescale depopulation of central South Africa, called the Mfecane. The Boers moved into this void).
There is much residual hatred against the Afrikaners, so that horrific Farm Attacks occur, in which farmers are tortured and killed. The government statistics hide this by various tricks, as they are scared about their international reputation as The Rainbow Nation. There have been some independant documentaries on this recently though. Outside of Afrikaans media, they are often not reported. I worked in a rural referral hospital, so saw horrific attacks - such as women who had their faces forced onto hot grills or children tortured with boiling water or clothing irons.
So the Afrikaners used to be highly religious and saw themselves as a People of God under a new Covenant. Nowadays 16 December has become much less celebrated, the Afrikaners far more secular, and many of the Churches aging and emptying. We do need prayers though, as there are concerted efforts against our culture and livelihood. One of the parties in South Africa, the EFF, has stated they want to impoverish the Afrikaners and routinely sing anti-Apartheid songs like 'Kill the Boer' or 'Bring me my machine gun'. A lot of this animosity is based on economic imbalances and historic events. I don't know if I would call us 'true children of God' anymore. My wife says that the Afrikaner often acts like the children of Cain, and she is the daughter and granddaughter of Dutch Reformed ministers.
We are poor sinners here at the foot of Africa, with nowhere else to go. This is our home, though many are emigrating, becoming strangers in foreign lands. There is much hatred against us. We have not always been good, and as we fell away, whoring after other gods like Mammon and worldly power, perhaps it is poignant that God delivered this 'New Israel' into the power of New Philistines and Amorites. We need to return to God, to the faith of our fathers.
I second the need for prayers, but prayer as the Publican prayed: "Have mercy on us poor sinners, Lord."
