Denying is easy.. two of top 4 people in MQM in UK have admitted meetings and transfer of money to MQM accounts.. those accounts have been tracked back to company run by Indians in Dubai. Proofs of that financial support are with London Police. Go on, say our hands are clean, say you refuse to accept and you wouldn't disappoint anybody in Pakistan.
MQM's centre has been raided several times, many times, many a times, Indian ammunition is recovered from their political offices. There are admittances of terrorists that they went to India and where they got their training and from whom. But again, Pakistan's sufferings shouldn't be discussed as the only terrorism that matters is terrorism from Pakistan.