There are many things going on and if we seek it as bitcoin and crypto market discussion forum then it's in the best interest of all but some take it on other matters threatening each other which is wrong.But I understand your point here that new members could not express their thoughts clearly under these cases.
But we can't ban these accounts and the best option according to me is push that ignore button for the member from whomsoever we have the problem and then keep posting your way.
The new members need to understand that this is open discussion forum and you need not to worry about anything keeping in mind you follow the rules and there could be different opinions on the same matter so if you face similar situations just avoid them and treat it as discussion forum only.
This is a much bigger problem: Bitcointalk in general is very unfriendly to Newbies! It was already like that when I joined, and in the first years I was afraid to get a red tag for some unimportant tiny mistake.
There are some members who are rude towards the low ranking members and have unethical behaviour towards them which we all have faced at some point but you can tackle them with growing on the forum and enhancing your knowledge to give them reply.