making frequent trips to Pakistan is not really "having links with Pakistan". What about his links to Algeria or any other country he visited?
Well for an Indian it is. I have family friends in Lucknow who have relatives in Karachi and are married to people in Pakistan. For an Indian getting a visa to Pakistan is very very tough. And if this chap managed to go to Pakistan several times, thats "having links to Pakistan".
SIMI is an Indian organization anyway.
Yes SIMI was an Indian organization. It has been banned now.