No but they must include God as being the source of their freedoms.
The left has tried to get God out of public life because they know that individuals that source their self worth in God have no fear of death when they seek to live a moral life. If you have no fear of death, then you can not be manipulated into living an immoral life ruled by fear by those who know only how to rule and manipulate by fear and force. The constitution of the US was designed for a people who live by their faith not by fear or forced coercion.
The Proud Boys must remember this if their vision is to gain traction. Their desire for a restoration of western chivalry is good but chivalry grew out of the Christian notion of Might being used for what is Right and true and good and decent(Or Might For Right, per Cs Lewis). It is not “Might gives the right for those who have it to declare what they think is right(the true explanation of the short phrase might makes right as per CS LEWIS).
And changing their name to something that doesn’t sound like an SA detachment from Munich in 1930 wouldn’t hurt, either. They have messaging problems, and are too easy to caricature.