alluded to support for democratic movements

[GoodTaste]

China’s ambassador to the United States, Qin Gang, recently joined his Russian counterpart, Anatoly Antonov, to denounce Mr. Biden’s summit as hypocritical and hegemonic. Writing in The National Interest, the conservative magazine, they alluded to support for democratic movements in authoritarian countries that became known as “color revolutions.”

Source: New York Times

Can you see whose support, Biden's or China's support for democratic movements? Logically it's Biden's, but its grammar is not clear to me.

 

[Tarheel]

They are talking about Biden's support for those democratic movements.

 

[GoodTaste]

They are talking about Biden's support for those democratic movements.

Is the grammar clear to you? Why not "Biden's support" to avoid ambiguity?

 

[5jj]

If you read the whole article, you will know that the allusion was to support (in the past) from western countries for colour revolutions. This is not clear from just the two sentences quoted.