UEFA chief executive Lars-Christer Olsson said: "They are creating a smokescreen to hide their ambitions for an alternative competition."
And he warned the G14's £740million claim for compensation in the Charleroi case over players injured on international duty needed to be taken "very seriously".
G14 wants the regulations surrounding the compulsory release of players for international matches changed and clubs to be compensated if players are injured playing for their countries.
Olsson added: "I tend to judge people on what they do and not so much on what they say."
