the main reason for BCH pump is Korean exchanges, offering trades for 0% fees.
this is not new so it is the last reason why it is being pumped. the main reason is the suspension of SegWit2x fork and the pre-planned pump of BCH in this month which everyone knew already.
also, someone pushed so many small transactions into bitcoin I think for a reason ( most transactions are 1 Sat/Byte which is very less and only congests network )
there will always be a spam attack at times like this and there are lots of 1-30 s/B transactions but there are also lots of high paying transactions too. 50,000 (or nearly half) of the transactions are paying 300 s/B fees
second bitcoin cash is having all the temporary hashing power,
LOL, yeah. there has been 46 blocks in past hour and 92 in 2 hour (normally there should be 6 per hour).
as unconfirmed transition increases most people will start solo mining bitcoin.
number of unconfirmed transactions has nothing to do with mining. they don't change the difficulty.