The Masih Fra'ud
]Pure, inside and out
Be kind and merciful to humanity, for all are His creatures: Do not oppress them with your tongue, or hands, or in any other way. Always work for the good of mankind. Never unduly assert yourselves with pride over others, even those who are placed under you. Never use abusive language for anyone, even though he abuses you. Be humble in spirit, kind and gentle, and forgiving, sympathetic towards all and wishing them well, so that you should be accepted. There are many who pretend to be kind, gentle and forgiving, but inside they are wolves; there are many on the outside who look pure, but in their hearts they are serpents. You cannot be accepted in the presence of the Lord unless you are pure, both on the outside and inside.
Hadhrat Masih Mauood, Kashti Nooh
Mirza Sahib used abusive language for his opponents. He called those who didn't accept him "zurrayatul baghaya". This means "progeny of whore". More collquially, today one might say "you son of whore" or "your mother is a prostitute". Ahmadis in a pathetic attempt to justify this garbage, soften up "baghaya" to mean "wicked". Right. Here's a test. Go to an Arab, any Arab, and ask them what "baghaya" means. Look it up on the Internet. Go into a bookshop, find an Arab dictionary, and look it up. Even better still, look at the context in which Mirza Sahib himself used these words, in his own writings, and you'll be clear.
Why should I ever believe in his claim, or even take him to be a decent man, when he has called my mother, and his own wife, a whore?
If I say to you "Bastard", and then in an attempt to appear holier than thou, or perhaps to placate you because I want your money for example, I backtrack "but the way I mean it, it means your metaphorical spiritual lineage is not saintly", will you not just laugh in my face?
Reference: Ahmadiyya Official Site