But how do the current negotiations permit that? How will Iran build a bomb if they are required to reduce current supplies by 97% and not enrich over 3% when 90% is required to build a bomb?
See above
90% required, less than 3% allowed. How will they build a bomb with only 3% enrichment?
Also, you seem to think the deal is based on trust.. Completely wrong. All of Iran's nuclear facilities are subject to inspections and the sanctions don't see relief until they pass initial inspections of all facilities and the sanctions can snap back into place at any time if they violate the terms of the agreement, so why would they agree to the deal only to avoid their responsibilities? They wouldn't, there would be no point.
Everything you're saying is categorically wrong
You have no idea what their current supplies are, just what they tell us. They have consistantly lied to us in the past, to assume they are being truthful now is just foolish.
The deal
is based on trust. They hid their facilities from us in the past and will continue to do so. When friendly Iranian citizens told inspectors of the hidden facilities, the inspectors demanded access. They were then forced to leave the country. The "sanctions" mostly consist of our seizing of their assets, several billion dollars worth. They have continued to sell oil, despite sanctions, to Russia, China, Syria, and much of the rest of the world. Even those countries joining the sanctions inadvertingly bought their oil because all they had to do was put a false flag on their tankers or use contractors to ship it. They get ALL their billions back in a short time and will not place it in places where we can seize it again. "Their responsibilties" are to destroy The Little Satan (Israel) and The Great Satan (us). This agreement furthers that goal.
Iran is the 5th largest oil exporter in the world. Gasoline is $0.30 a gallon there. Nuclear power is far more expensive than than they can produce with oil. Medical equipment requiring radiation sources is shipped to Iran with that material already inside. They have no need of nuclear power or material, except to build bombs.
Your blind trust in the largest finaceer of terrorism is foolish. Their history indicates everything I'm saying is categorially correct, but your fawning trust in a president who has demonstrated a proclivity to lie to his own people has overiden common sense. The facts are there for anyone to see, but a kool-aid drinker like you ignores them. There is no point in discussing this with you any further, your ideology prevents you from using your brain.