Did Beyak become a Liberal? Let's explore what Pierre Trudeau thought:

"The 1969 White Paper (officially entitled Statement of the Government of Canada on Indian policy) was a Canadian policy paper proposal made in 1969 by Prime Minister Pierre Trudeau and his Minister of Indian Affairs, Jean Chrétien. The federal government proposed that by eliminating "Indian" as a distinct legal status, the resulting equality among all Canadians would help resolve the problems faced by Aboriginal peoples. The main provision of the White Paper was to eliminate Indian status as a distinct legal status for Aboriginal people, which the federal government envisioned as a step to achieving equality among all Canadians, by regarding Aboriginals as equal citizens like other Canadians." Thanks Stock.

https://en.wikipedia.org/wiki/1969_White_Paper