As for the religious status of Ahmadis, they do not fit the definition of Muslim. There is a clear documented procedure to being Muslim. In its simplest form it is the declaration of faith and the belief in 1 God and that Muhammad pbuh is his final messenger.
If your religious beliefs are contrary to that, you are welcome to them, but they are not Islam.
You are of course free to decide whether or not you believe Ahmadis to be Muslim or not. Just as they should be free to define themselves as Muslim if they choose. If you're in favour of the state having the power to legally regulate how individuals or groups choose to define themselves, then I'd say you're part of the problem and can have no complaints should you and your beliefs be targeted in a similar manner.
Zlatattack said:
People are opposed to blasphemy laws because religion doesn't matter to you. If you are one of those people than consider them our equivalent to laws against treason. In the secular world nothing is more precious than the nation state and treason will get you the most harsh punishment. Why? Because national identity is how you define yourselves, your society etc. It's precious to you. We consider Islamic identity precious in that same way.
People - religious, non-religious, and/or secular - are opposed to such laws because (a) they violate stuff like freedom of speech/expression, and (b) as you've noted they are often abused in order to pursue petty vendettas and religious persecution.
Second, treason is not the secular equivalent of blasphemy. Freedom for the citizenship to 'blaspheme' against the nation-state is one of the fundamental cornerstones of liberal democracies. For example any Irish citizen may walk down a street in Ireland with a placard declaring the Irish state to be illegitimate, they may mock the founders of the Irish state to their heart's content, or declare that Irish nationhood is based on a series of lies, safe in the knowledge that the powers of the state may not legally be wielded against them. Of course, perhaps Ireland is a poor example to use since we also have a ridiculous blasphemy law still on the cards, thankfully it is rarely if ever used.
Treason requires some definitive action to be taken against the state, not just propaganda or preaching.
The easiest way out of this predicament would be a name change for the group, but I doubt the Qadianis would accept this solution. Any other solutions which can peacefully resolve the issue?
The 'easiest way'? Seriously?
How about this - just leave people free to define their religious identity as they please. 'Problem' solved.
Qadian is the name of the place in Pakistan where the groups' leader Ahmad originate. In SE Asia people are generally recognised or referred to from the place of their birth or origin.
Most if not all (other) South Asian Islamic movements are referred to by how they define themselves. In the two (other) cases I can think of where an Islamic movement is generally referred to by a place name - Barelvis and Deobandis - adherents of both often use the term themselves, although Barelvis are named for their founder (Ahmad Riza Khan Barelvi) who in turn was named for his place of origin, Bareilly, and seem to prefer Ahl-i Sunnat wa Jamaat, or just Sunnis. As you know, both movements are Hanafi Sunni and these designations are used simply to distinguish particular trends within South Asian Hanafism, so their use isn't really equivalent to the use of Qadiani.
Ahmadis do not refer to themselves as Qadianis, and consider the term offensive. They'd prefer to be recognised simply as Muslims, since this is what they 100% believe themselves to be (no less than you or Zlatattack do), but if you can't bring yourself to do that then Ahmadi suffices.