Mirza Ghulam Ahmad hated everyone. In this specific case he is caught making derogatory remarks about Hazrat Ali (ra).
” that is why leave the matter of old khilafat , take new khalifat . an alive Ali is among you , you ( people ) leave that , and you are in search of dead Ali “
Quoted in malfoozat – part one page 300( ref quoted in foot notes I.e alhakm binding no.4 number 41 , page 1-2 dated 17 Nov. 1900 )